$\left(\tan\left(x\right)\right)^3\tan\left(y\right)-\tan\left(x\right)\tan\left(\tan\left(y\right)\right)^3$

$\int\frac{e^x}{e^{2x}-4}dx$

$\left(4m^2-3n^2\right)^2$

$-2+4+6$

$\int1\frac{1}{\left(y^2-1\right)^2}dy$

$-7=7u+28$

$\left(2x-3\right)^2-3\left(x+4\right)<3x^2-3x-14$