$\lim_{x\to3}\left(\frac{sin\frac{\pi x}{18}-\frac{1}{2}}{5x-15}\right)$

$\left(4x\:-\:2y\right)^3$

$\int x\left(\sqrt{x}-1\right)dx$

$-1\cdot\left(2+-5\right)$

$3x^2y+9x^3y+7x^2y+13x^3y$

$\frac{\sin\left(5x\right)+\sin\left(x\right)}{\cos\left(5x\right)+\cos\left(x\right)}=\frac{\sqrt{3}}{3}$

$\left|12\cdot\left(-9\right)\right|$