$2an^4-16an^2+32a$

$\frac{\sec\left(x\right)\csc\left(x\right)}{2\cot\left(x\right)-\sec\left(x\right)\csc\left(x\right)}=\sec2\left(x\right)$

$-2xym-2xyn$

$\sqrt[4]{\frac{256}{16}}$

$\frac{\left(n+1\right)\left(2-n\right)\left(5-n\right)}{n\left(n+3\right)\left(2n-1\right)}$

$\frac{3x^3+2x^2+3x+7}{x^2+1}$

$25+7x=8x+15$