The middle term in the expansion of (2x+3y)12 is
12C7 (2x)5(3y)7
12C6(2x)6(3y)12
12C7(2x)7(3y)5
12C6(2x)6(3y)6
The numerically greatest term in the expansion of (2x−3y)12) when x=1,y=53, is