Answer: step 2, instead of adding the exponets together they should have done 5^3 first and then done the result of that (125) ^2
When you multiply an exponent directly into another exponent, you multiply the exponents.
For example:
[tex](x^{2} )^6=x^{2(6)}=x^{12}[/tex]
[tex](x^{4})^1=x^{4(1)}=x^4[/tex]
[tex](5^{3})^2=5^{3(2)}=5^6[/tex]
So #2 is incorrect
