$\left(-5.-3\right)-\left(-6\right)$

$\left(2x+3y+2z\right)^2$

$\int_1^{\infty}\left(\frac{1}{x\sqrt{\ln\left(x\right)}}\right)dx$

$\frac{\left(2^n\right)x^n}{\sqrt{\left(4n+1\right)\cdot\:5^n}}$

$\left(2y+3\right)\left(y-7\right)$

$\int\frac{6x}{\left(x^2+1\right)}dx$

$4y^2-18$