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" The coefficient of "x^(20)in(1+x^(2))^...

" The coefficient of "x^(20)in(1+x^(2))^(40)(x^(2)+2+(1)/(x^(2)))^(-5)" is "

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The coefficient of x20 in the expansion of (1+x^(2))^(40)*(x^(2)+2+1/x^(2))^(-5) is :

The coefficient of x^(20) in the expansion of (1+x^(2))^(40)*(x^(2)+2+(1)/(x^(2)))^(-5) is: