$\int x^n\cos\left(x\right)\:dx$

$\frac{1+\sin\left(2x\right)}{\csc\left(2x\right)}$

$\int\frac{1}{\sqrt{x^4+10x^2+25}}dx$

$\:x^2+3x+3>\:0$

$\int_0^{\pi\:}t^2cos\left(nt\right)dt$

$6r-3r-r$

$\left(-\frac{7}{8}m^2n\right)\left(\frac{3}{5}mn-\frac{1}{6}m^2n^2-\frac{3}{8}m^3n^2\right)$