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

$3n+3=6$

$\lim_{x\to0}\left(\frac{x\cos\left(y\right)+y\left(cos\left(m\right)cos\left(x\right)-sin\left(m\right)sin\left(x\right)\right)-ycos\left(m\right)}{x}\right)$

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

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

$\frac{d}{dx}\left(sin7x\right)^{6x}$

$628+242$