$4\left(2m^2+y\right)+3m$
$x^2=6x+7$
$-2x+4x-3y+18y$
$25y^2-64$
$\frac{-ax^2-2bx-2x-a}{\left(x^2-1\right)^2}$
$4\sin^3x-3\sin x=-\frac{3}{4}$
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