$42x+130x+25$
$-600\:-\:-50$
$25x^2+x+4$
$2\cdot\left[-3+5-\left(12-20+5-7+3\right)+4-\left(9-12+3+6+9\right)\right]$
$x+3>-5$
$12+-20\cdot\frac{40}{4}$
$\frac{x+2}{3}<1$
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