All math below is included in the page as MathML. It is rendered in canvas objects. See the page source
sin(x) + 9: x 9
(a+b)^2: a b 2
ax^2 + bx + c: a x 2 b x c
2*x*y+(1+x)/(1+x^2): 2 x y 1 x 1 x 2