$-\:\left(1\:\:-\:2\:-\:3\right)\:-\:\left(5\:-\:5\:+\:4\:+\:6\:+\:8\right)$

$\int\left(\frac{lnz^2}{z}\right)dz$

$log\left(16x\right)+3log\left(x\right)=20$

$\int\cos\left(2x-\pi\right)dx$

$\int\frac{4-x}{x^3\left(x+1\right)}dx$

$\left(1+y^2\right)\:dx=\left(\sqrt[2]{1+y^2}\cdot cos\left(y\right)-x\cdot y\right)dy$

$3\left(x+1\right)=5\left(x-2\right)+7$