poker probability math

mathematically please help?

Find the number of houses in a full poker hand, ie many hands of poker with three of a kind and two of its kind.

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[From 13 tracks, choose one] * [of 4Suite, paragraph 3] * [other 12 lines select one] * [4 sticks Select 2] = 13C1 * 4C3 * 4C2 * 12C1 = 13 * 12 * 4 * 6 years: 3744 -----