Maths, typeset as you type.

Write a short line of AsciiMath, and your students see it set as in a textbook, plots included, the moment you type it: on the screen you share, or on their own phone.

Open the editor See everything it does

You type	AsciiMath	They see	typeset maths
A plot	one line	Students	no account
Runs in	the browser	Price	free

# Tangent to a parabolaf(x) = x^2y = f(1) + f'(1)(x - 1)= 1 + 2(x - 1)= 2x - 1plot: x in [-2, 3]; x^2; tangent(x^2, 1)

Tangent

Tangent to

Tangent to a

Tangent to a parabola

f (x)

f (x) =

f (x) = x^{2}

y

y =

y = f (1)

y = f (1) +

y = f (1) + f^{'} (1) (x

y = f (1) + f^{'} (1) (x -

y = f (1) + f^{'} (1) (x - 1)

y = f (1) + f^{'} (1) (x - 1) =

y = f (1) + f^{'} (1) (x - 1) = 1

y = f (1) + f^{'} (1) (x - 1) = 1 +

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x -

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x - 1)

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x - 1) =

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x - 1) = 2 x

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x - 1) = 2 x -

y = f (1) + f^{'} (1) (x - 1) = 1 + 2 (x - 1) = 2 x - 1

y = x^{2}

y = x^{2}

y = 2 x - 1

tangent·modifiedsaved·viewer·live 24

Figure 1. Left, what you type; right, what your students see, as you type it.

Point at a line on the left to see what it does.

A titleA line that starts with # and a space is a title; with ##, a subtitle.

A formulaAny other line is a formula, in AsciiMath: x^2 is $x^{2}$ , f'(1) is $f^{'} (1)$ , sqrt x is $x$ .

The next stepA line that starts with = (or <=, =>, ~~…) goes under the formula above, aligned on its relation.

A plotplot: draws functions, points and lines. tangent(f, a) adds the tangent at $x = a$ , with its equation in the legend.

§1

No pen tablet needed. No LaTeX either.

Online, maths is usually handwritten with a mouse, scribbled on a tablet, or typeset in LaTeX after the lesson. live-math lets you type it during the lesson, almost as fast as you say it, and it looks as good as a book.

Handwriting with a mouse
Type it instead
AsciiMath reads the way you would write maths in a message: sqrt(x^2 + 1) becomes $x^{2} + 1$ , a/b a fraction.
A blurry shared screen
Sharp on every screen
Formulas and plots are drawn by each browser, not filmed: crisp on the screen you share, and on every student's phone with the live link.
Plots drawn by hand
One line per figure
plot: sin x draws it, with exact labels: zeros, tangents, areas, complex roots, the unit circle, sign charts.

The same formulas, typed in LaTeX and in live-math, with the characters each takes. The output is the same.
LaTeX		live-math		What it looks like
`\lim_{x \to 0} \frac{\sin x}{x} = 1`	35	`lim_(x->0) sin x / x = 1`	24	$lim_{x \to 0} \frac{s i n x}{x} = 1$
`\int_0^1 x^2 \, dx = \frac{1}{3}`	32	`int_0^1 x^2 dx = 1/3`	20	$\int_{0}^{1} x^{2} d x = \frac{1}{3}$
`\begin{cases} x + 2y = 1 \\ 3x + 4y = 2 \end{cases}`	51	`{(x + 2y = 1),(3x + 4y = 2):}`	29	${x + 2 y = 1 3 x + 4 y = 2$
`\begin{vmatrix} 1 & 2 \\ 3 & 4 \end{vmatrix} = -2`	49	`\|(1,2),(3,4)\| = -2`	18	$1324 = - 2$
`\vec{v} \in \mathbb{R}^3`	24	`vec v in RR^3`	13	$v \in R^{3}$

§2

One line, one figure.

A word at the start of a line turns it into a drawing, labelled with exact values where they are notable. It never solves the exercise for you: it shows what you are explaining, so that students notice it.

- \frac{3 π}{2}

- π

- \frac{π}{2}

\frac{π}{2}

π

\frac{3 π}{2}

y = sin x

y = (sin x)^{'}

plot: sin x; derivative(sin x); x in [-2pi, 2pi]

- 3

3

y = x^{3} - 3 x

plot: roots(x^3 - 3x)

- 2

2

y = 4 - x^{2}

\int_{- 2}^{2} 4 - x^{2} d x = \frac{32}{3}

plot: area(4 - x^2, -2, 2)

Re

Im

z_{0}

z_{1}

z_{2}

z_{3}

z_{4}

z_{5}

z_{6}

z_{7}

(3 + 4 i)^{\frac{1}{8}}

plot: (3+4i)^(1/8)

\frac{1}{2}

\frac{π}{6}

\frac{5 π}{6}

sin x \geq \frac{1}{2}

gon: sin x >= 1/2

- 2

1

3

x - 1

x + 2

x - 3

-

0

+

0

-

∄

+

- 2 \leq x \leq 1 \lor x > 3

sign: (x - 1)(x + 2)/(x - 3) >= 0

Every kind of figure, in the manual

§3

Built for teaching, live.

What a lesson needs is a key away, and nothing else reaches the students' screen: no buttons, no menus, only the sheet.

Alt+V
A viewer to share
A tab with the sheet alone, to share in the video call you already use. Paper or blackboard, bigger or smaller, from the editor.
Alt+L
The live
Students open a link on their own device and follow as you write, or scroll back at their own pace. No account, no app.
mouse
Point and mark
A pointer everyone sees. Drag to circle or underline, Shift and drag to highlight: the marks stay on their symbols.
Alt+SAlt+R
The curtain
Write the solution before the lesson, then reveal it a line at a time. Try it on the right.
Alt+G
Move a plot
The arrows move its window, + and − zoom: the line rewrites itself, and everyone sees the plot move.
Ctrl+K
Lessons, recorded
Every live is recorded: a link replays it as it was written, long pauses shortened. Or publish a frozen copy of the sheet.
Alt+E
Export
PDF, HTML or LaTeX, to send after the lesson.

# Exercise 4x^2 - 5x + 6 = 0curtainDelta = 25 - 24 = 1x = (5 +- 1)/2! x_1 = 2, quad x_2 = 3

Exercise 4

x^{2} - 5 x + 6 = 0

or Alt+R, as in the editor

Figure 2. The curtain: what is below it stays in the editor until you reveal it.

§4

Free for everyone. The live, on request.

The editor, the viewer and the exports work for anyone, without an account. The live, the cloud and the recorded lessons need a login: free as well, you only have to ask.

	Openno account	With accessGoogle, or a code by email
Editor, viewer, exports	yes	yes
Students see it	on the screen you share	also on their own device, with a link
Sheets	on this computer, or in this browser	also in the cloud, on any computer
Lessons	—	recorded, replayed with a link
Published sheets	—	a frozen copy, with a link
Cost	free	free

Nothing to install. Open it and type.

Open the editor or read the guide first

Maths, typeset as you type.

Tangent

Tangent to

Tangent to a

Tangent to a parabola

No pen tablet needed. No LaTeX either.

Type it instead

Sharp on every screen

One line per figure

One line, one figure.

Built for teaching, live.

Exercise 4

Exercise 4

Exercise 4

Exercise 4

Free for everyone. The live, on request.

Ask for access

Nothing to install. Open it and type.