Explicație pas cu pas:
3! = 1×2×3 = 6
4! = 1x2x3x4 = 24
5! = 1x2x3x4x5 = 24×5 = 120
6! = 1x2x3x4x5x6 = 120x6 = 720
7! = 1x2x3x4x5x6x7 = 720x7 = 5040
8! =1×2×3×4×5×6×7×8 = 5040×8 = 40320
9! = 1x2x3x4x5x....x9 = 40320 x9 =362880
10! = 1x2x3x4x5x...x10 = 3628800
3! x4! = 6 x4 = 24
6! - 5! = 5! ( 6-1) = 5! x5 = 120×5 =600
10! - 9! = 9! ( 10 -1) = 9! x9 = 362880 x 9 = 3265920
0! + 2! -4! +5! = 1 +2 - 24+ 120 = 99
4! + 6! = 24 + 720 = 744
7! - 6! = 5040 - 720 = 4320
