find the specified term in the expansion in the following binomials

fifth term of (2a+3b)^12. evaluate it when a=1/3 b=1/4

The specified term in the expansion of (*x* + *y*)* ^{n}* is given by

Putting *x* = 2*a*, *y* = 3*b*, *n* = 12 and *r* = 4 we get

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