$36x^2-y^2-60x-10y$

$3\left(1+f^2\right)\frac{dy}{df}=2fy\left(y^3-1\right)$

$\int\frac{5x-4}{6x-x^2-x^3}dx$

$2\frac{1}{2}+\left(-0.5\right)$

$\lim_{x\to\infty}\left(\frac{1}{cos\left(x\right)}\right)$

$\frac{d}{dx}x^3-5x^2y+2y^3=7$