Cool series

Algebra Level 5

\[ \large \dfrac1{2\cdot4} + \dfrac{1\cdot3}{2\cdot4\cdot6}+ \dfrac{1\cdot3\cdot5}{2\cdot4\cdot6\cdot8}+ \dfrac{1\cdot3\cdot5\cdot7}{2\cdot4\cdot6\cdot8\cdot10} + \ldots = \ ? \]

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