$\int\frac{-4x^2+5x+33}{\left(x-2\right)\left(x+2\right)\left(x-3\right)}dx$

$\left(\sin x+1\right)\left(\sin x-1\right)=-\cos^2x$

$\frac{d}{dx}\left(2^{1-x^2}\right)$

$y'=2y^3$

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

$21-\left[11-\left\{6-\left(32-4\right)\right\}\right]$

$\frac{x^2}{9}-\frac{2xy}{3}+y^2$