$5\int\sin\left(x\right)\cdot\cos\left(x\right)dx$

$\left(x^2+1\right)\frac{dy}{dx}=6x-3xy$

$\frac{\left(\frac{\sin\:^2\left(x\right)}{\cos\:^2\left(x\right)}\right)^{\cos\:\left(x\right)}}{\sin^2\left(x\right)}$

$\frac{4x^4}{x-2}$

$\frac{5x^4-2x^2-3}{-2x^3+x-1}$

$\:64\:x\:94$

$\lim_{x\to1}\left(\frac{1-4x^2lnx}{x^2-1}\right)$