$-x-6\le8x+2$
$9a^2-49$
$650-58$
$\left(7x\right)^3$
$15\:sin\left(2t\right)\:+\:25\:sin\left(t\right)\:=\:0$
$3-2\:x\:5\:+7\:x\:4$
$2x-3y+z=3$
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