$\frac{u^{-15}v^{12}}{u^{12}v^{-17}}$

$\frac{dy}{dx}=\frac{12x+5y}{5x-2y}$

$\left(-7\right)+6+\left(-5\right)+5\left(-8\right)+\left(-13\right)+9+11$

$1=\tan\left(x\right)\sin\left(x\right)^2+\cos\left(x\right)^2$

$\frac{d}{dx}x^2+xy+y^2$

$4x^2+-8y+-3xy+5x^2+2xy$

$\frac{y}{1+y^2}dy=x\cdot\:dx$