# Sum up these coefficients !!!!!!

Find the sum of the following series :-

$$(^{ }{ C }_{ 0 }-{ 2 }^{ 2 }\times ^{ }{ C }_{ 1 }+{ 3 }^{ 2 }\times ^{ }{ C }_{ 2 }-.......+{ (-1 })^{ n }({ n+1 })^{ 2 }\times ^{ }{ C }_{ n })$$where n>2.

$$Details\quad and\quad Assumptions$$

$$^{ }{ C }_{ r }=^{ n }{ C }_{ r }$$

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