$x^2+12x+36+x^2+7x+30$
$6x\:-\:17\:<\:1$
$10a^2b^3c^4-15x^5b^2c^4+30a^3b^3c^2$
$42^2+23-4$
$x-4y=12$
$5\sqrt[3]{8a^4}$
$x=\sqrt{2x+7}-2$
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