$\frac{-12w^9z^4}{144w^2z^3}$

$\int_{\frac{-2\pi}{3}}^{\frac{\pi}{3}}\left(\frac{\sin\left(x\right)}{1+\cos\left(x\right)}\right)dx$

$\left(x-y+3z\right)\left(x-y-7z\right)$

$\left(2b+5\right)\left(2b-9\right)$

$\left(xy+y^2\right)dy+\left(xy+x^2\right)dx=0$

$\lim_{x\to\infty}\left(\frac{4x^2-2x+1}{\sqrt{3x^4-3x^3+1}}\right)$

$42-\left(-1.64\right)$