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12.5, 12.6, 12.8 duration 1 hour 56 minutes 12.5, 12.6, 12.8 12.5, 12.6, 12.8	12.5, 12.6, 12.8 derivative function times rule prime x. chain root ladder tangent radius minus functions side wall sine equation power thing half From Andrew Lutz 0 likes 12 plays 0