$-4x^2+18x-47=-6x^2+34x-71$
$\left(30m-17m^2\right)^3$
$3x+8\le x+2$
$\int\sqrt[3]{\left(1+7x\right)}dx$
$3-2\cdot5-3\cdot4+3$
$4x^2+3y^2+5y^2+x^2-3y^2$
$\frac{1}{sin^2x}-\frac{1}{1-cosx}=\frac{2+cosx}{sin^2x}$
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