1 + (9*9) - 6 = 76
I don't know about 73 or 77.
Using These Numerals 1,9,9,6 in the same order how can you make the numbers 73 76 77
2 answers
73 = 19 + 9 * 6
76 = 9 * 9 + 1 - 6
77 = 96 - 19
76 = 9 * 9 + 1 - 6
77 = 96 - 19