find the difference

Name:

1000 - 397

100 - 68

3000 - 972 - 87

1000 - 845 - 98

33 000 - 33

3 999 - 999 - 99

748 - 79 -21

587 - 122 - 78

1367 - 264 - 36

1563 - (563 + 796)

573 - 456 + 156

537 - (543 - 163) - 57

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