Answer:
36
Explanation:
The bolded letters are the differences in each step.
Your biggest friend in this problem is P.E.M.D.A.S (or synonyms to it)
It stands for Parenthesis, Exponents, Multiplication/Division, Addition/subtraction.
3[75÷(3^3-2•6)+7]
3[75÷(27-2•6)+7]
3[75÷(27-12)+7]
3[75÷15+7]
3(5+7)
3•12
36
I hope this helps!