$\left(a+5b\right)\left(a^2-5ab+2b\right)$

$\left(4xy^3\right)^3$

$y=6x^{-6\sqrt[4]{x}}$

$27y^2+18y+3$

$\frac{\sin\left(x\right)}{\tan\left(x\right)}+\frac{\tan\left(x\right)}{\csc\left(x\right)}=\sec\left(x\right)$

$3xy+3ym-3ay$

$\lim_{x\to infinity}\left(\frac{n}{a^n}\right)$