$\left(\frac{1}{5}+\frac{1}{n}\right)^nx^n$

$36y^2=\left(x^2-4\right)^3$

$1\left(2\right)+\left(3\right)\left(1\right)\left(-3\right)+\left(2\right)\left(4\right)\left(-5\right)+\left(5\right)\left(0\right)$

$14xy^2+21x^2-28xy$

$\int_1^{\infty}\left(\frac{1}{x^3+2x}\right)dx$

$cot\left(x\right)=cos\left(x\right)sin\left(x\right)+cos^3\left(x\right)csc\left(x\right)$

$\frac{x^2-6+9}{2x+2}$