$16p^4-4p^6$

$\frac{x-2}{3x+5}<4$

$\frac{2}{\left(1-\cos\left(x\right)\right)\left(1+cos\left(x\right)\right)}\:$

$\int\frac{2x+4}{x^3+2x}dx$

$tan\left(x\right)sin\left(x\right)tan^2\left(x\right)\left(tan^2\left(x\right)+\left(sin^2\left(x\right)+cos^2\left(x\right)\right)\right)$

$18m^3n^4-16m^2n^3-24m^4n^7$

$\tan\left(x\right)\cdot\left(\cos\left(x\right)-\csc\left(x\right)\right)$