Question

Are the following expressions equivalent?

Answer 1

Yes they both equal 12x + 2.
2(6x + 1) 3(4x - 2) + 8
12x + 2 12x - 6 + 8
12x + 2

Answer 2

12x +13  equal to or not equal to 12x - 6 + 8 or 12x +2

No, these expressions are not equivalent.
Hope this helps!