}}{\left (-0+0\,t\right )^{0}}} %                                  0 %0\,{\frac {{t}^{0}\left (0\,{t}^{0}\right )^{n}}{\left (-0+0\,{t}^{0} %\right )\left (-0+0\,t\right )^{0}}} %                                  0 %-0