$2888+42$
$\lim_{x\to0}\left(\frac{x\cdot2^x}{2^x}\right)$
$4\left(9-x\right)-\left(4x+3\right)=7+6\left(x-5\right)$
$\left(x^2y+\frac{1}{x}\right)$
$4x^2-7x-8$
$-e^1$
$a^2+22a+7$
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