$-2\:+\:\left(-3\right)\:-\:3-\left(-2\right)\left(-3\right)=\:\:\:\:$

$\lim_{x\to1}\left(\frac{1-x^2}{2-\sqrt[2]{x^2+3}}\right)$

$\int\left(5-sin\left(\frac{t}{5}\right)^2\right)cos\left(\frac{t}{5}\right)dt$

$\left(y\:+\:xy\right)dy\:+\:dx\:=\:0$

$\frac{d}{dx}\frac{\sqrt{4+x^2}}{x\sqrt{4-x}}$

$10x+3>=10$

$\frac{2x+10}{x+3}\ge1$