$-3m^2n;m\:=2yn\:=-3$

$\frac{dx}{dt}=6tx^2$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{1-\cos\left(x\right)}{1-senx}\right)$

$\frac{45^5}{45^3}$

$-10\:-\:\left(10\:+\:-2\right)\:x\:10$

$\lim_{x\to4}\left(\frac{4-x+\:\ln\left(x-3\right)}{x^3-6x^2+32}\right)$

$\frac{1}{2\left(1-cos^2\left(x\right)\right)}=\frac{\tan\:\left(x\right)}{sin\left(2x\right)}$