$\left(-80\right)\left(3\right)\left(-1\right)\left(3\right)$

$e^{-x}\frac{dy}{dx}=x^2y^3-4yx^2$

$y'=x\left(y-70\right)$

$\frac{d^2}{dy^2}\left(xye^{x+y}\right)$

$\lim_{x\to0}\left(\frac{x-\cos\left(x\right)-1}{sin\left(x\right)-x}\right)$

$\frac{dx}{dt}=sin\left(t\right)e^{x+cos\left(t\right)}$

$\frac{x^3-27}{x+3}$