$f\left(x\right)=\cot\left(4x^5\right)+e^x^4$
$2x^2-50=0$
$\frac{3}{4}x+2<\frac{1}{3}$
$1=\cos^2\left(a\right)-sen^2\left(a\right)$
$\frac{\cos^{4}\theta-\sen^{4}\theta}{\cos\theta-\sen\theta}$
$\frac{1728}{3.2}$
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