$\frac{2x-1}{2}\leq\frac{1}{3}$
$x2+0x+49$
$7\left(101+97\right)^{2}$
$-2sen\left(2x-1\right)$
$4\sin^3x-3\sin x=-\frac{3}{4}$
$\frac{12}{7}m+\frac{5}{7}\:.\:2m-5$
$-3\left(2x-8\right)$
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