$\frac{4xy^2\cdot2x^{-2}y}{xy}$

$-3z+x+z-2y+2z+6$

$2\left(\frac{x^2}{3x-1}\right)-3\left(\frac{x^2}{3x-1}\right)$

$\left(\sin\left(x\right)+\cos\left(x\right)\right)^2+\left(\sin\left(x\right)+\cos\left(x\right)\right)^2-2$

$\left(x-5\right)^2e^4^x$

$\sqrt[3]{a}^3$

$3 - 8 s + 4 s + 9$