\[ 3\left( 1 \right) +5\left( \frac { 1 }{ 2 } \right) +7\left( \frac { 1 }{ 3 } \right) +9\left( \frac { 1 }{ 4 } \right) +\cdots+87\left( \frac { 1 }{ 43 } \right) \]

Can anyone help me with the summation above?

I approximated and got a close answer but I want a proper technique to approach this problem. Thanks in advance!

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