$\frac{sin\left(-\frac{31\pi}{6}\right)cos\left(-10\pi\right)}{tan\left(\frac{59\pi}{6}\right)}$

$2\sin\left(x\right)\cdot\cos\left(y\right)=1$

$11b^2\sqrt{100b^4g^6}$

$4\frac{4}{3}\:mixto$

$\int\left(9-5x\right)^8dx$

$\lim_{x\to0}\left(\frac{4-4\cos\theta}{\sin3\theta}\right)$

$\:\left(-9-7\right)\:-\left(9-1\right)=\:$