$\sqrt{2}-4\sqrt{2}-5\sqrt{2}+10\sqrt{2}$

$\frac{\sin\left(x+y\right)-sin\left(x-y\right)}{cos\left(x+y\right)+cos\left(x-y\right)}$

$50.09^4-3$

$\frac{9}{x-1}+\frac{2}{x-1}$

$-72\left(x^2-14x-28\right)$

$\int_{-7}^7\left[3+\sqrt{49-x^2}\right]dx$

$\lim_{x\to\pi}\left(\frac{sin\left(x\right)}{sin\left(x+\pi\right)}\right)$