$\frac{x^4+3x^3-2}{x^2+2x-1}$

$13\sqrt{3}-\:8\sqrt{3}-\:4\sqrt{3}+\:10\sqrt{3}+7\sqrt{3}$

$\int\frac{1}{x\left(x+3\right)\left(x^2-3x+9\right)}dx$

$\left(-1\right)^2\cdot2^2$

$\left(\frac{3}{5}w+\frac{7}{3}\right)^2$

$\frac{10z}{\sqrt{5z}}$

$\frac{-2\sin\left(x\right)}{\left(2+\cos\left(x\right)\right)^2}=0$