$\left(2f^2+g\right)^2$

$\frac{d}{dx}\ln\left(ax+b\right)^2$

$-\left[23-\left(34+18+9\right)-12\right]+23$

$\frac{\cos^2\left(x\right)+\cos\left(x\right)}{\sin\left(x\right)+\sin\left(x\right)\cos\left(x\right)}\:=cot\left(x\right)$

$\frac{3x^5-x^3+x-2}{3x^3-1}$

$2x-3y+4x-y+5x$

$20+90+5155$