$34-65+89+88-765$

$\frac{\ln\left(60\right)}{2}-\frac{\ln\left(50\right)}{5}$

$5\sqrt{12}\cdot3\sqrt{75}$

$\frac{\left(x'\right)}{1-4x}=\frac{1}{1-t^2}$

$\left(x-\frac{9}{2}\right)^2$

$\lim_{x\to\infty\:}\frac{\left(5-4\sqrt{x}\right)}{2+11\sqrt{x}}$

$\int\left(x^2-3\right)^32x\:dx$