$\int e^{cos\left(5x\right)}\cdot sin\left(5x\right)dx$

$\frac{12x^2\:+3x\:\:}{-4x-1}$

$\int\frac{9}{x+1}dx$

$\int-\frac{5}{3}dx$

$2\left(1-x^2\right)^2-\left(1-x^2\right)+5$

$\frac{x^{-3}y^4}{x^{-3}}$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{\left(12x-6\pi\right)}{cos\left(2\pi\right)}\right)$