$m\:2\:-14m+49=\:81$
$\int_0^{-1}x^3\sqrt{1-x^2}dx$
$67.5+78.9+.83+567$
$\frac{dy}{dx}2xy-y^2=3$
$5x+10\:.\:5x-10$
$\left(\frac{2x^2}{4x^4}\right)$
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