$\int\left(15xe^x\right)dx$

$x^2+18x+35=0$

$8^3\cdot8^7$

$csc\left(x+y\right)=\:\frac{csc\left(x\right)csc\left(y\right)}{csc\left(x\right)cos\left(x\right)+csc\left(y\right)cos\left(y\right)}$

$\left(\frac{-\left(2m\right)^3}{n^2}\right)$

$20+90+51^2$

$\int\left(x\left(x-20\right)^5\right)dx$