1−4(e4−1)\frac{1}{-4}\left(e^{4}-1\right)−41(e4−1)
14(e4−1)\frac{1}{4}\left(e^{4}-1\right)41(e4−1)
13(e4+1)\frac{1}{3}\left(e^{4}+1\right)31(e4+1)
15(e4−1)\frac{1}{5}\left(e^{4}-1\right)51(e4−1)