math
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3 defs 22 3 defs 22 5 defs 18 3 defs 18 3 defs 23 6 defs 20 2 defs 19 6 defs 23 7 defs 23 3 defs 19 5 defs 25 3 defs 23 3 defs 20 5 defs 16 3 defs 20 6 defs 24 3 defs 18 6 defs 19 5 defs 17 7 defs 22 3 defs 22 5 defs 21 5 defs 20 3 defs 20 5 defs 22 6 defs 26 6 defs 27 5 defs 20 3 defs 21 6 defs 24