$-2+\left(4-5+2\right)-3-\left\{1-\left[6+\left(-3-1\right)-\left(-2+4\right)\right]+3-4\right\}$

$\int\frac{\left(2x+3\right)}{x^2-3x}dx$

$f\left(x\right)=\left(2+x\right)^2$

$\:\left(m-\frac{5}{4}\right)^3$

$-8x^3-12x^2-6x-1$

$\frac{dy}{dx}+y=e^{x+2}$

$\frac{2x^2+3x-5}{x+1}$