Answer:
-3906
Explanation:
-6[7-(-225+15)×3]
Solve everything in the parenthesis first:
-225+15=-210
-6[7-(-210)×3]
Simplify expression:
-6[7+210×3]
7+210=217
-6[217×3]
217×3=651
-6[651]
-6×651=-3906
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