$2\frac{4}{5}-\frac{2}{5}-1\frac{1}{5}$

$\left(e^x-e^-x\right)^2$

$-2c+c+6$

$\sqrt[3]{\sqrt{x\sqrt{x\sqrt{x}^m}=x^5}}$

$\int\frac{\left(\sqrt{y^2-9}\right)}{9}dy$

$\frac{dy}{dx}=\left(x^2+4\right)=xy$

$\lim_{x\to\frac{\pi}{6}}\left(\sqrt{\cos\left(2x\right)+\sin\left(x\right)}\right)$