$\int\left(\frac{5}{x^2+4x+8}\right)dx$

$\int\left(6\left(3x-7\right)^9\right)dx$

$\int\:20x\left(6x^2+5\right)^4dx$

$\sin^{-1}\left(\sin\frac{\pi}{3}\right)$

$\int\frac{1}{\left(x^2-2x+2\right)\left(x+1\right)}dx$

$\lim\:_{x\to\:0}\left(\frac{cos\left(x\right)-sen\left(\frac{x}{2}\right)}{x}\right)$

$3x+2y-z=3$