$\:100x^2\:+\:13x^2\:-\:20x^2$
$\left(yc-xb\right)^2$
$4a^2-64=0$
$4\left(1\right)^3-4\left(1\right)^2+9\left(1\right)-9$
$\left(\frac{1}{x+1}\right)+\frac{1}{x+2}-\frac{5}{4}=0$
$\frac{dy}{dx}=2-7x,\:where\:x\left(1\right)=-4$
$\frac{x-10}{x^24x+2}$
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