$x\:+\:2<3x\:+\:1$
$50+190$
$-6+c-6+a-c-c+36$
$3x^2+9x+6$
$2x^2-12x+29$
$3000-375$
$\left(x^2+x-20\right)-\left(x+5\right)$
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