$x^2-3x-20$

$\frac{d}{dx}\left(7xln\left(6x\right)-7x\right)$

$\frac{1}{y}\cdot\frac{dy}{dx}=4x\cdot\ln\left(x\right)$

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

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

$x^4+8x^3+24x^2+32x+16$

$x^2\left(2x\right)^3$