Найдите значения выражения: ( 5 7) 10 13 (4 20) ( + * + : - (18 12) 31 51 (17 51)=

 (5/18+7/12) *2 10/31+1 13/51 :(4/17-20/51) = -6

1) 5/18+7/12 = 10/36+21/36 = 31/36

2) 4/17-20/51 = 12/51-20/51 = -8/51

3) 31/36*72/31 = 2

4)64/51 : (-8/51)  = 64/51*(-51/8) = -8

5) 2+(-8) = -6 

 (5/18+7/12) *2 10/31+1 13/51 :(4/17-20/51) = -6

1) 5/18+7/12 = 10/36+21/36 = 31/36

2) 4/17-20/51 = 12/51-20/51 = -8/51

3) 31/36*72/31 = 2

4)64/51 : (-8/51)  = 64/51*(-51/8) = -8

5) 2+(-8) = -6