$\left(4x^3+1\right)^3$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{3\cos^2\left(x\right)}{2-2\sin\left(x\right)}\right)$

$x^2\left(x-xy\right)$

$x^2+-3x+5$

$\left(xyz\right)\left(x^4y^5z\right)$

$\left(\frac{1}{6}x^3-1\right)+\left(x^2-\frac{1}{2}x+\frac{5}{6}\right)+\left(-\frac{1}{3}x^3-\frac{5}{6}x^2+x-\frac{3}{4}\right)$

$3a-7b-2a+5b$