$3x-5=z+y-12$
$\int\frac{3}{2x^7}dx$
$x^2-x-2\ge0$
$2356\cdot37$
$\left(3y\:5\:\right)\left(5y\:4\:\right)$
$2sin^2x=3sinx-1$
$\frac { 12 n ^ { 2 } - 8 n } { 2 n }$
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