$\lim_{x\to infinity}\left(\frac{6x}{e^x}\right)$

$\frac{dy}{dx}=\frac{\sqrt{y^2-4}}{2}$

$\frac{243r^5+32s\:^5}{3r+2^5}$

$y^4+y^2=0$

$\cot\left(a\right)-\sin\left(2a\right)=\cot\left(a\right)\cos\left(2a\right)$

$\left(-5.001\right)^2-5\left(-5.001\right)$

$\int\frac{1}{4-5\sin x}dx$