$tan4x=\frac{4}{3}$
$\left[-3x^3\right]^{-2}$
$\lim_{x\to o}\left(\frac{sin2x}{tan5x}\right)$
$\frac{d}{dx}cos\left(2x+3y\right)=x$
$\int x^4\left(3x^5-2\right)^7dx$
$\frac{d}{dx}sen8x+sen\frac{x}{4}$
$25+19-5\left(108-107\right)-28+7$
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