$\int _ { 1 } ^ { x ^ { 2 } } t d t$

$\frac{d}{dx}\left(\frac{e^{4x}+e^{-4x}}{e^{2x}}\right)$

$\left(90.37\right)-\left(40.20\right)-\left(12.19\right)$

$\frac{2x-3}{5}-\frac{4x-3}{2}\ge\frac{3x+2}{3}$

$\frac{dy}{dt}=2t\left(y^{-1}-25\right)$

$-\left(-120\right)+\left(+9\right)$

$90+8^{0.5}$