(3-3)3+3-3+4=4
(4-3)3+4-4+4=7
(9-3)3+9-9+4=22
(12-3)3+12-12+4=31
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(3-3)3+3-3+4=4
(4-3)3+4-4+4=7
(9-3)3+9-9+4=22
(12-3)3+12-12+4=31