$xy\:dx-\left(x^2+2y^2\right)dy=0$

$35m^3-40m^5$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{2x}{sin\left(x-\frac{\pi}{2}\right)}\right)$

$y'=x^2-2x+3+6e^x,\:y\left(0\right)=-4$

$\frac{4^{2x+1}}{16^{7-x}}=4^{x+2}$

$-6-\left(-2-6\right)$

$cos\left(x-\frac{11\pi\:}{6}\right)$