$6x^5-10x^4-9x^2$
$\left(2yx-7x\right)^2$
$\int_5^5\left(x^3+2\right)^3x^2dx$
$\left(3\right)^2+\left(3\right)\left(7\right)+\left(2\right)\left(3\right)+\left(2\right)\left(7\right)$
$45^6.63^5$
$b^2+2b=-20$
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