If when you say "7 down" if you mean -7, the answer would be -489
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(-7) - 5 - 2 = -14
-4 + -3 = -7
18 minus 11 is 7.
6 over 7 minus 5 over 7 is 1 over 7.
negative 49. This is because a minus multiplied by a plus is a minus.