2200[(1+.09(1-.28))^35-1
2200(1.09)(.72)^35 - 1
2200.[1.09. 0.000010154] - 1
2200[ -0.99998893214]
-2,199.75 ????????.
It appears that your are trying to calculate some financial problem!. But your formula, the way you have it written, doesn't make any sense!!!. The best thing to do is give us the full problem and will show you how to solve it accurately.
