$\sec\left(x\right)=-2.2$
$\sqrt[3]{a}.\sqrt[9]{a^3}$
$\frac{4y^4}{25}-\frac{3y^2}{5}+\frac{9}{16}$
$\left(x^3-4\right)^3$
$\frac{14^9}{14^3}$
$49x^2-64n^2$
$\int\frac{x}{\sqrt[2]{4x-x^2}}dx$
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