$\left(x+2\right)^2-\left(2-x\right)^2-\left(x-4\right)^2-x^2-16$

$-2\left(x^4+3x^3-6x^2+9\right)$

$\left(2-6-3\right)-\left(2-4-6\right)$

$\frac{\left(-9m+2\right)}{2}=10$

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

$\int\left(\frac{lnx}{3}\right)dx$