$x^4-7x^3+5x^2+31x-30$

$8m^6-27$

$\frac{1}{4}\int\left(\sin\left(x\right)^{-2}\cdot\cos\left(x\right)\right)dx$

$\lim_{x\to0}\left(\sqrt{4x^2+x}-2x\right)$

$12y^3+9-7y^2-y^3+4y^2-2$

$\lim_{x\to\infty}\left(1+\frac{ln\left(x+1\right)^2}{x}\right)$

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