$\cos^2\left(x\right)+4\sin^2\left(x\right)+2\cos\left(x\right)=12$

$\left(-368\right):\left(-4\right)$

$\int\left(5\:cos\:\left(x\right)e^{sen\left(x\right)}\right)dx$

$8-3\cdot\left(-5\right)-6$

$\cos\:^{\left(6\right)}x+3\cos\:^{\left(2\right)}x\sin\:^{\left(2\right)}x+\sin\:^{\left(6\right)}x=1$

$\lim_{x\to0}\left(\frac{x}{x-2\sqrt{x}}\right)$

$\lim_{x\to1}\left(\frac{x^n-1}{x^m-1}\right)$