$\cot^2\left(x\right)=\cos^2\left(x\right)$
$628+242$
$\csca\left(1-\cos^{2}a\right)=\sena$
$\frac{1}{3^{2n-1}}$
$\left(x^2+12x+36\right)\left(x+6\right)$
$\int\frac{x^3}{\sqrt[4]{6+x^4}}dx$
$x\left(x+1\right)\ge6$
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