$-17+25-\left(-58\right)$
$20ab+11ab$
$534+736$
$7\:x\:-2\:x\:5$
$\left(8m\:-\:3n\right)-\:\left(m+n\right)$
$\left(5a-6b\right)^3$
$3x^4+6x^2-9x^5+11x-12x^2-1$
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