Question 123531
1/3^2-(-1/2^3)(1/3-(-1/2)
= (1/9)-(1/8)((1/3)+1/2))
= (1/9)-(1/8)(5/6)
= (1/9)-(5/48)
= (3/[9*48]
= (1/144)
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Cheers,
Stan H.