$24x^2+20x+2$
$4x^6+4x^3+4$
$2a+3b-2c+2c-3b$
$-x+x+1$
$\left(x-1\right)\left(x+1\right)$
$\left(p+3q-\frac{1}{3}z\right)^2$
$2\tan^2x-3=3$
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