(5+4) x 7- 7 x (15 - (3x4 )
9 x 7 - 7 x (15 - 12)
63 - 7 x 3
63 - 21
= 42
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(5+4) x 7- 7 x (15 - (3x4 )
9 x 7 - 7 x (15 - 12)
63 - 7 x 3
63 - 21
= 42