$2x^2-x+2=y$

$15x^{\left(2\right)}-8x+16$

$\int\frac{x^2-x+1}{\left(x+4\right)\left(x-2\right)}dx$

$\frac{d}{dx}\left(400\cdot e^{-0.02x}\right)\cdot x$

$\frac{dy}{dx}=\frac{y^2}{x^2-1}$

$\int\frac{3z}{\sin\left(x\right)}dx$

$\left(csc\:45-tan\:30\right)cot\:30\:sen\:45+sen\:30$