$\frac{dy}{dx}+2y=sin\left(x\right)$
$165+320+154$
$\left(6a-3b+c\right)^2$
$\frac { 3 } { 3 } i ^ { 2 }$
$\frac{3}{5}x=21$
$y=\arctan\left(\frac{x}{7}\right)+\frac{3x-9}{7\left(x^2+2\right)}$
$\lim_{x\to0}\left(\frac{2}{1-\cos\left(x\right)}\right)$
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