82-(90-69)+(78-59+12)

Question

82-(90-69)+(78-59+12)

Answer 1

1)90-69=21
2)78-59=19
3)19+12=21
4)82-21=61
5)61+21=82

Answer 2

90-69=21
78-59+12=31
82-21=61
61+31=92