$2-\left(5+2\right)-\left[\left(10+7\right)-\left(6-3\right)\right]$

$2y'=\frac{x}{y}+\frac{y}{x}$

$\int e^{3x}sin\left(-3x\right)dx$

$4\left(x+y\right)+x\left(x+y\right)$

$\frac{x}{2}+16=2$

$\left(2^x\right)\cdot\left(x^2\:+x+\:1\right)$

$3m^4n+5n-8m^4n+2n^4+6m^4n$