$2x\:+\:4x\:+\:7x$
$\int\cot\left(-3x-2\right)dx$
$( 3 x + 2 ) ^ { 3 }$
$\left(-5\right)\cdot\left(-3\right)\cdot\left(-2\right)\cdot\left(-4\right)$
$\left(n^9-8\right)\left(n^9+3\right)$
$121+88x+9x$
$-8d-9d$
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