$\int\left(x+3\right)\left(\sqrt{x-3}\right)dx$

$\left(4a+5ab\right)^2$

$\lim_{x\to0}\left(\frac{senx}{senx}\right)$

$\frac{\left(x^3-125\right)}{x^2+5\:x\:+25}$

$y_{\left(2x-1\right)}3$

$\int\left(\frac{2}{x}+\frac{3}{x^{2}}-\frac{5}{x^{3}}\right)dx$

$\left(9-3\right)-\left[5-\left(2-8+3\right)-\left(4+3\right)\right]$