$\left(-9\right)\cdot\left|-12-\left(+15\right)\right|$

$\int\left(\left(x^3+5\right)^8\left(3x^2\right)\right)dx$

$\frac{x^{-3}\cdot y^{-1}\cdot z^{-1}}{2x^{-3}\cdot y^{-1}}^2$

$\frac{\sin\left(x\right)^2}{\sin\left(x\right)}=\sin\left(x\right)$

$10x=-2y-8$

$x\left(4x+3\right)\le\left(2x+1\right)^2$

$\int_0^2\left(\frac{1}{35-x^2-2x}\right)dx$