$-5y+6y+9y-14y$
$\int_{-1}^32x-2dx$
$4y''-12y'+9y=0$
$\lim_{x\to0}\left(x+\frac{1}{x}\right)\:$
$64x^2+64x=9$
$\frac{2x^2+x-45}{x^2-9}$
$\:\lim_{x\to0}\left(-\frac{\left(x^2+1\right)}{\left(\sqrt{x^2-49}\right)}\right)\:$
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