$45a^2-52ab+3ab-90a^2+47ab+8$

$-48x^2+224x-240$

$\int2\left(4x+5\right)^4dx$

$\left(1+tan\left(x\right)\right)\left(1+cot\left(x\right)\right)$

$x\:\frac{dy}{dx}+2y=8-\frac{1}{x}$

$\frac{csc\left(x\right)}{sen\left(x\right)}+csc\left(x\right)cot\left(x\right)$

$2\log x=3\log\frac{x}{10}$