$x^2-20x+20$
$\left(5y\:-\:3z\right)^3$
$sec\left(8x+3\right)\:\:csc\left(2x+7\right)$
$28t^2+31t-5$
$171-1-2$
$1+2q+q^2$
$a^2+2ab+a^3$
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