$\lim_{x\to2}\left(\frac{x+4}{x^2-2}\right)$

$\frac{2sin\left(60\right).sin\left(40\right)}{cos\left(20\right)}$

$\left(x+2\right)\left(x+3\right)\left(2x-4\right)^2$

$3+4^2\cdot2-\sqrt{36}+15^0$

$\frac{dy}{dx}=2\left(y-3\right)\left(y+2\right)$

$5y+4-6+2y$

$f\left(t\right)=e^t-1e^t$