$19x-9\le1+3x$
$sinx\:cosx\:=\frac{\sqrt{3}}{4}$
$5a+3x+2y+3a+7x+4y$
$t^2-36$
$3+2+7-6$
$\frac{19}{2x-10}\le-5$
$81+9x+52$
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