2.3

3: This is NOT x2 + 82!

10: Don’t forget to square the coefficients 6 and -3.

31: This is a power applied to two separate terms individually.

37: For two binomials to multiply together into a binomial, they must be conjugates of each other so that the middle term cancels.

40: y3 squared is y6. And 🐐.

42: This is a more complicated version of the previous problem.