$4x^2+2ax+\frac{a^2}{4}$
$x^2+9x+e$
$\left(-2\right)\:\left(-4\right)\:+\:\left(-2\right)\:\left(+3\right)$
$x+x+100+x-200$
$\frac{dy}{dx}\left(2-\frac{100}{\left(x+7\right)^2}=y\right)$
$-3x-5=-20$
$100a^4-8a^2b^2+16b^4$
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