(30/5) + 2 x 4 =
14
(5 x 3) + 8/2 - 6 +3 =
16
4 + (8 x 2 -4) - 20/2 =
6
5 x 2 + 10 -3 x 52 =
-136
5 x 4 - (10 x 2) + 6 =
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