$4n^2+12-8n$

$4y^3\left(\frac{dy}{dx}\right)=3\sqrt{x}$

$3x^2+8xy^2-10x^2y+2xy+7x^2y$

$\left(-4\right)\cdot\left(+4\right)\cdot\left(+8\right)\cdot\left(-6\right)\cdot\left(-5\right)$

$8\cos^3\left(x\right)=6\cos\left(x\right)$

$\frac{d}{dx}s^2+\frac{1}{4}i^2=si+i$

$\frac{45a^8}{9a^5}$