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= 4! - 2 *( 9!/7!) + 3*(8!/(2!*6!)) = = 24 - 2*((7!*8*9)/7!) + 3*((6!*7*8)/(2*6!)) = = 24 - 2*8*9 + 3*7*4 = = 24 - 144 + 84 = = - 36