$c\:+\:2\:+\:c\:+\:2$
$x^2+18x+1=0$
$3x^4-2x^4+7x^4$
$\int\:\frac{1}{3-4x}dx$
$2cos^2x+5sinx-4=0$
$\frac{dy}{dx}=2-\frac{y}{100-x}$
$\left(2y^m-3\right)^2$
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