Respuesta :

Simplify 2^2 to 4
Then simplify 4-1 to 3
Then simplify 15 divided by 3 to 5
The simplify 12 divided by 4 to 3
Then simplify to 2

15➗(4-1)-12➗4
15➗3-12➗4
5-12➗4
5-3
2
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