$\left(+4\right)^2\cdot\left(+6\right)^2$
$y\left(3y+2\right)$
$3cot^2x+7cotx+2$
$8-2x\ge0$
$x^4+6x^2-7$
$\int\frac{8-x}{\sqrt{25+x^2}}dx$
$\left(t^a+4\right)\left(t-7\right)$
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