I would be happy to be helpful!
5 more than the sum of -1 and -12
lets start with the 2nd part, the sum of -1 and -12
sum means adding 2 things together, so -1 + -12 = <u>-13</u>
now lets work on the first part again, it said 5 MORE, more means add as well, so
-13 + 5 = -8