$2f+1\ge7$
$\left(x-\frac{3}{5}\right)^3\left(\frac{4}{5}-x\right)$
$\frac{x^7}{7}-\frac{x}{5}$
$\int\frac{\left(\sqrt{x^2+4}\right)}{y}dx$
$\left(15x^2y-3xy^2\right)^2$
$+2+7-10$
$\left(\sqrt{3}x+9\right)^2$
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