0
Anonymous
7 + 5 + 4 ÷ 2 + 7 = 21
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-12
5 + 2 + 3 + 7 + (21/7) = 20
7 plus neagtive 5 = 2
It is plus 2,
(2 + 4i) - (7 + 4i) = -5 2 + 4i - 7 + 4i = -5 + 8i