exam Maths Puzzle Numerical Ability

Im in Independent study,and working on Pacemaker Algebra 1, And I have a real hard time with Chapter 6. Its all about Writing Liner equations,slope and y-intercept,using point and

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exam Other Question

Given set A= (1,2,3) and set B= (2,3,4)

A. A and B are equal sets
B. A and B are equivalent sets
C. A and B are both equal and equivalent.
D. No of the above. Please help me solve this problem:

5-2*2+8*5-2=28

I was asked to add parenthesis where it makes the problem equal 28. I could not figure it out, please help.