1.7.10.9 算点等于24

嗯!
网友都做的不错!
常规运算：
1:(1 - 9) × (7 - 10)
2:(7 - 10) × (1 - 9)
3:(10 - 7) × (9 - 1)
4:(9 - 1) × (10 - 7)
特殊运算：
(9/(10-7)+1)!=4!=4*3*2*1=24
(10/(9-7)-1)!=4!

(1-9)*(7-10)

1: (1 - 9) × (7 - 10)
2: (7 - 10) × (1 - 9)
3: (10 - 7) × (9 - 1)
4: (9 - 1) × (10 - 7)

（9-1）*（10-7）=24