$\frac{dy}{dx}=y^2+2y-15$

$\left(1+x\right)^4\cdot\left(1-x\right)^4$

$\left(\sqrt{3}+\sqrt{3}\right)^8$

$\left(\left(x+6\right)\left(x+3\right)\left(x+7\right)\right)$

$4b^2c^3-b^3c^2+2b^2c^3+21b^3c^2-9b^2c^3$

$20+90+51\left|d\right|$

$r\left(t\right)=\frac{1}{t}i+\sin\left(3\right)j$