P = $\frac{1}{2.3}$ + $\frac{1}{2.3.5}$ + $\frac{1}{2.7.5}$ + $\frac{1}{2.7.9}$ +...+ $\frac{1}{2.99.101}$
2P = $\frac{2}{2.3}$ + $\frac{2}{2.3.5}$ + $\frac{2}{2.7.5}$ + $\frac{2}{2.7.9}$ +...+ $\frac{2}{2.99.101}$
2P = $\frac{1}{1.3}$ + $\frac{1}{3.5}$ + $\frac{1}{7.5}$ + $\frac{1}{7.9}$ +...+ $\frac{1}{99.101}$
4P = $\frac{2}{1.3}$ + $\frac{2}{3.5}$ + $\frac{2}{7.5}$ + $\frac{2}{7.9}$ +...+ $\frac{2}{99.101}$