$\frac{3-y}{x^2}dx\frac{y^2-2x}{xy^2}$

$x\sin\left(x\right)-x\cos\left(x\right)$

$e^{xy}=\left(e^x\right)^y$

$\int_0^{\sqrt{\ln\left(2\right)}}2xe^{x^2}dx$

$3-\left(8+7-9-10\right)+2\left[3-\left(4-6+2\right)\right]$

$-2x+5>x+3$

$x^4-\left(x+4\right)\left(x-4\right)\left(x^2+19\right)$