$\left(-4abc-2xy^3\right)^2$

$\frac{e^x}{e^{2x}}$

$\left(-x+12y\right)\left(-x-2y\right)$

$s^2+20s+\left(\frac{b}{2}\right)^2$

$\frac{dy}{dx}+4=y^2,y\left(0\right)=-4$

$\sin\left(a\right)-\sin\left(a\right)\cos^2\left(a\right)=\sin\left(a\right)^3$

$10x^{2}y-15xz^{2}+25\times2$