Let the function 𝑓:[0,1]→ℝ be defined by $\mathrm{f}(\mathrm{x})=\frac{4^{\mathrm{x}}}{4^{\mathrm{x}}+2}$ Then the value of $\mathrm{f}\left(\frac{1}{40}\right)+\mathrm{f}\left(\frac{2}{40}\right)+\mathrm{f}\left(\frac{3}{40}\right)+\ldots \ldots \ldots+\mathrm{f}\left(\frac{39}{40}\right)-\mathrm{f}\left(\frac{1}{2}\right)$ is