Evaluate 45-(1+4)2+3

*the 2 is an exponent.

45-(1+4) to the power of 2+3
45-5 to the power of 2+3
45-25+3
20+3
23

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.