4+9-6+23-9-6+55-6-7+89-55+4-6+2+2

4 + 9 - 6 + 23 - 9 - 6 + 55 - 6 - 7 + 89 - 55 + 4 - 6 + 2 + 2 = 93;

4 + 9 = 13;

13 - 6 = 7;

7 + 23 = 30;

30 - 9 = 21;

21 - 6 = 15;

15 + 55 = 70;

70 - 6 = 64;

64 - 7 = 57;

57 + 89 = 146;

146 - 55 = 91;

91 + 4 = 95;

95 - 6 = 89;

89 + 2 = 91;

91 + 2 = 93.