$-6+5+6+8+7+1+9+7$

$\frac{dy}{dx}=\frac{\left(1-y^2\right)}{2x}$

$\frac{4x\:+\:12y}{32xy}+\:\:\:\:\:\:\frac{8xy}{2x\:+\:6}$

$\frac{d}{dx}\left(y=\left(x^2+9\right)^{ln\left(x^2\right)}\right)$

$\int e^{-x}du$

$\frac{440}{11}$

$\left(a^3b-b^2\right)\left(a^6b^2+a^3b^3+b^4\right)$