How to use the math keypad
You don't need to know LaTeX to type a math answer — plain typing works, and the buttons below help with the rest.
Opening the keypad
Next to every math answer box there's a beaker-icon button. Tapping it opens the keypad with three tabs: Basic for numbers and operators, Trigonometry for trig functions and Greek letters, and Calculus for derivatives, integrals, sums and limits.
Typing directly also works
You can type straight into the box: sin(x)^2, sqrt(2), 3/4 — with spaces wherever you like, they're no longer stripped. If you already know LaTeX, that works too: \frac{1}{2}, \sqrt{2}, \pi all preview correctly and get folded into the same plain form.
Fraction, absolute value and roots
The a/b (fraction), |x| (absolute value) and ⁿ√ (nth root) keys insert a blank-filled template and land the cursor in the first blank — type there, then click or use the arrow keys to move to the next blank.
Integral and sum with limits
The definite integral (∫ₐᵇ) and sum-with-limits (∑ₐᵇ) keys work the same way: the cursor starts in the lower-limit blank — after typing it, click into the upper-limit spot to fill that in too. The plain ∫ and ∑ keys are still there for indefinite use.
Other functions and symbols
The Trigonometry tab has sin, cos, tan and their inverses (⁻¹), cotangent (cot), secant (sec), cosecant (csc), the hyperbolic functions (sinh, cosh, tanh), and the Greek letters π, θ, α, β. The Calculus tab has d/dx (derivative), lim (limit), and the ≤, ≥, ≠ signs.
The "=" row is just a calculator
When what you've typed can be computed, a preview and a numeric result ("=") show up under the box. That's just there to check your arithmetic — it isn't submitted on its own; your answer is whatever's in the box.