$8x+4y+y-2y-3x$

$5+2+3-4+9-9$

$\left(1+\sin\left(a\right)\right)\left(1-\sin\left(a\right)\right)=\frac{1}{\sec\left(a\right)}$

$\int_{-3}^{-3}6dx$

$\int\:\:x\sqrt{4x-1}\:dx$

$\lim_{x\to\infty}\left(\frac{x+cos\left(\frac{\pi}{2}-x\right)+2\sqrt{x}}{x+sin\left(x\right)}\right)$

$5+\left(+1\right)-\left(-1\right)$