math
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7 defs 19 6 defs 16 5 defs 21 6 defs 26 3 defs 25 6 defs 17 3 defs 22 6 defs 22 6 defs 21 5 defs 21 6 defs 17 7 defs 16 3 defs 25 3 defs 16 5 defs 19 3 defs 21 3 defs 17 3 defs 17 5 defs 20 7 defs 29 6 defs 18 5 defs 16 5 defs 18 6 defs 30 6 defs 22 6 defs 18 7 defs 31 5 defs 19 6 defs 21 5 defs 16