Answer:
98
6
109
48
81
Step-by-step explanation:
50 +42 +6= 98 { just add}
(8 - 6) + 4 = { first the parenthesis}
2 + 4 = 6
85 + 6 x 4 = {first the multiplication}
85 + 24 = 109
(90 - 50) + 8 = { first the parenthesis}
40 + 8 = 48
12^2 - 7 x 9 = {first the exponent then multiplication}
144 - 63 = 81
