Evaluate ddx[log2(x3+1)]\frac{d}{dx} \left[ \log_2(x^3 + 1) \right]dxd[log2(x3+1)].
\frac{3x^2}{(x^3 + 1)\ln 2}
\frac{3x^2}{x^3 + 1}
\frac{\ln 2 \cdot 3x^2}{x^3 + 1}
\frac{1}{(x^3+1)\ln 2}