$\frac{\left(2xy\right)^{\frac{4}{3}}}{\left(9x\right)^{\frac{4}{3}}}$

$\lim_{h\to0}\frac{\left(\sqrt{68-9\left(x+h\right)}-\sqrt{68-9x}\right)}{h}$

$\left(-5\right)^3\left(5\right)+10-\left(2\right)^3$

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

$\left(-xy\right)^6$

$\left(\frac{2}{x+3}\right)\left(\frac{x}{x+3}\right)$

$\int_0^3x^2e^{-x^3}dx$