- = 1 4 + 4 - 4 - = 2
4 - - = 1 + = 2
x = 1 4 + - 4 = 2
- = 1 x = 2
- + = 1 + - = 2
= 1 = 2
+ = 3 + = 4
+ = 3 4 x = 4
4 - = 3 + x = 4
4 - + = 3 4 + 4 - - = 4
+ - = 3 = 4
( 4 + 4 - ) : = 3 = 4
+ + = 5 4 + 4 - = 6
4 + = 5 ( + ) x = 6
4 + - = 5 4 x + = 6
+ = 5 4 x - = 6
( 4 + 4 + ) : = 5 4 + x = 6
( 4 x 4 + 4 ) : 4 = 5 ( 4 x 4 - 4 ) : = 6
4 + 4 - = 7 + + + = 8
4 + + = 7 4 + 4 x = 8
4 x - = 7 ( + ) x =8
( 4 x 4 - ) : = 7 4 + 4 + 4 - 4 = 8
[- ] : = 7 4 + 4 + - = 8
( - ) : =7 4 x x : = 8
4 + 4 + =9 4 + 4 + 4 - = 10
4 x + = 9 ( 4 + ) x =10
( 4 x 4 + ) : =9 4 + 4 + = 10
[+ ] : = 9 4 + + + = 10
( + ) : =9 x + = 10
= 9 ( 4 x 4 + 4 ) : = 10
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