$2x^2+bx$
$3^{x+10}\:+\:1\:=\:10$
$36x^2-1=0$
$3a^2-4a-15$
$\left(2x\:+\:y\right)^2+\left(2x+y\right)^2$
$\frac{3x^2}{x^2+2}$
$6z^2+2z$
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