$\frac{\left(1+cot\left(x\right)\right)}{csc\left(x\right)}=sin\left(x\right)+cos\left(x\right)$

$\int\frac{-81x}{\left(x^2+81\right)^{\frac{3}{2}}}dx$

$3\:\sqrt{5^{16}}$

$\frac{3s-7}{-s-9}$

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

$14x^4-14x^3+42x^2+7x$

$\left(d+3r\right)^5$