$\int_{ln5}^{ln7}\left(e^{-x}\right)dx$

$\lim_{x\to0}\left(\frac{-3sin\left(5x^3\right)}{-5x}\right)$

$\sec\left(x\right)\frac{dy}{dx}=\sec\left(x\right)y^2+3y^2$

$\int\frac{3x+11}{x^2\:-x\:-\:6}dx$

$\int y\sin\left(2y\right)dy$

$\sqrt{1}9$

$\frac{\left(a+b\right)^2-\left(a-b\right)^2}{4ab}$