$\:\frac{2x+6}{4x^2-12x+9}$
$\left(-20\right)\left(-20\right)$
$8x^2-14x+3$
$\left(4x^5\right)+\left(5x^6\right)^2$
$x^2-6x-7>0$
$2\left(4x\right)^2+4x$
$\frac{2x^4-2x^3+2x^2-2x+1}{x+1}$
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