19+35-29+68-17-51=

(a)  

56-12-38+77-33+19=

(a)  

23-17+54-39+42+35=

(a)  

52-36+21-23+61-44=

(a)  

12+81-79+35-27-16=

(a)  

41-26+48-57+89-76=

(a)  

31+63-79+82-46+21=

(a)  

47-24-17+51+23-38=

(a)  

17+66-58+32-41+82=

(a)  

25+58-21-18-34+76=

(a)  

81-56+24-47+96-84=

(a)  

16+67-28+23-46+34=

(a)  

44-29+24+53-89+78=

(a)  

27+65-47+23+31-99=

(a)  

21 -16+42 +52 -75 -19+ 87=

(a)  

43+54 -63 -19+ 84 -18 -76=

(a)  

97 -43 -39 +73 -34 -21 -18=

(a)  

32 -17 +72 -26 -46+ 62 -53=

(a)  

49 +33 -77+ 64+ 23 -56 +48=

(a)  

24 -19 +54 +23 -67+ 72 -85=

(a)  

98 -74 -18 +53 -34+ 29 -46=

(a)  

13 +51 -49+ 67+ 11 -38 +29=

(a)  

36 -12 +39 -47+ 42 +25 -68=

(a)  

71 -56 +54 -32 +29 -23 -17=

(a)  

46 +38 -19+ 34 -87 +55+ 11=

(a)  

29+ 51 -27 -48 +92 -76 -16=

(a)  

63 -27 +39 -51 -18 +77 -69=

(a)  

15 +64+ 13 -87 +19 +23 +41=

(a)  

64 -31 -18+ 47 +22 -79+ 83=

(a)