$\frac{\left(x^3-2x^2-7x-4\right)}{\left(x^2+2x+1\right)}$

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

$5n\:+\:6\:-\:3n\:-\:2$

$\sec\left(x\right)^2\cdot\csc\left(x\right)^2=\left(\tan\left(x\right)+\cot\left(x\right)\right)^2$

$\pi\int_2^6\left(6-\frac{6}{y}\right)^2dy$

$\tan^2\left(x\right)+1=\frac{1}{5}$

$\left(\sqrt{3}\right)\left(\sqrt{2}\right)^2$