$x+6=20$
$-2\left(x+9\right)-5x$
$-3x+7>13-5x$
$\left(-34+12\right)\left(-3\right)$
$x^2y+2xy^'-168y=0$
$4x\left(x-2\right)>\left(2x+8\right)\left(2x-8\right)$
$\int\sec\left(w\right)dw$
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