math
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3 defs 15 3 defs 15 2 defs 14 5 defs 17 3 defs 11 6 defs 17 5 defs 17 3 defs 19 5 defs 16 3 defs 15 5 defs 16 3 defs 20 3 defs 16 3 defs 18 5 defs 20 5 defs 22 2 defs 12 5 defs 18 7 defs 11 3 defs 10 6 defs 19 3 defs 14 5 defs 15 3 defs 10 4 defs 17 3 defs 15 5 defs 15 3 defs 15 5 defs 20 3 defs 14