$y'-2y=2-4x$
$\left(x^2-6x+8\right)\left(x^2-6x-8\right)$
$7x=49$
$2a^{-2}+\left(2a^{-2}\right)^4$
$xdx+2yxdx+x^2dy=0$
$\left(3x-4\right)\left(6x+7\right)$
$\int\:\:e^{-x}\:dx$
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