$2-2-6-\left(-2+2\right)$
$\left(4+x\right)^5$
$x+3\le7$
$\left(3x^3\:-\:4\right)\left(3x^3\:+\:4\right)$
$\left(4m+8n\right)\left(3m+12x\right)$
$9x^4+4x^4$
$\left(\frac{a}{s+\left(\frac{1}{rc}\right)}\right)$
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