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

$\int\left(\frac{\sqrt{x^2}-2}{x}\right)dx$

$3x^4+x^3-3x^2+8x+16;\:x=4$

$\left(2a^3+4b^2\right)^3$

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

$2\left(x-1\right)>4$

$\frac{\sqrt{12}}{\sqrt{12}}\frac{-3}{+3}$