$114x\left(-16\right)$

$25-\left(-12\right)+\left(56\right)-\left(30\right)-\left(30\right)$

$4\frac{dy}{dx}\frac{dy}{dx}\left(y\right)+4\frac{dy}{dx}\left(y\right)+17y=0$

$3\cos^2\left(x\right)-\cos\left(x\right)=0$

$18+6\left(9k-13\right)$

$\int_0^{\infty}2xdx$

$\frac{dy}{dx}=x^2y=-3x^2$