$f\left(x\right)=\left(2x+1\right)^2\:$
$m^3+15m^3+75m+125$
$sec^2x-\frac{4}{3}=0$
$\frac{d}{dx}x^2+a\sqrt{x}y+y^2=b^2$
$2x-8-8$
$6x^2-9x-15$
$3a-2=4$
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