$\left(-7m^2n^2\right)\left(3mn^2\right)$
$\:\frac{3}{2x-y}-\frac{5}{2x+y}+\frac{6x-7y}{4x^2-y^2}$
$x^2-16+16$
$-x\cdot2^4$
$6\:\frac{1}{6}+12\:\frac{1}{2}$
$\int\left(\sin\left(4x-3\right)\right)dx$
$87=x+87$
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