$c^2-3c+2$
$\tan^2\left(x\right)-\frac{\sqrt{3}}{3}=0$
$4x^2-x+2$
$5x^2-10x-75=0$
$2+3-5+4-6+3-8-2+4-2$
$( 3 z + a ) ^ { 2 } = 9$
$\int8\csc^2xdx$
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