$\lim_{x\to0}\left(\frac{4e^x-4}{\sin\left(x\right)}\right)$
$-30+-22$
$\frac{d}{dx}-cos\frac{x}{e^2}.cot\frac{x}{e^2}$
$\left(a+b^2\right)=a^2+2ab+b^2$
$\int\left(e^{\frac{x}{2}}\right)dx$
$4y+7y+3y$
$4a^2b-120x+8bx^2$
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