$x^2+9\ge0$
$2n^3-26n^2+60n$
$\left(21\right)\left(-3\right)\left(2\right)$
$\int_{-\pi}^{2\pi}\left(\sqrt[3]{4+3\cos\left(x\right)}\right)\sin\left(x\right)dx$
$\frac{\left(3x^4-5\right)^7}{8x^5+12x}$
$\left(3n-2m\right)\left(m+2y\right)$
$x^2-15x+9$
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