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

$\left(y+x^2y\right)^4$

$\left(8xyz\right)\left(-0.2x^2yz^4\right)$

$cot^2x-cscx-1=0$

$\int\left(2t^2\cdot e^t\right)dt$

$\int\frac{\mathrm{sech}\sqrt{x}\tanh\sqrt{x}}{\sqrt{x}}dx$

$\left(x^3+5x^2-2x+1\right)\::\:\left(x-3\right)$