Evaluate m0 - n2 for m = 2 and n = -1.
-1
0
1

First you should know : x ^ 0 = 1 and thats for all the numbers so m^0 = 1 too so now we just have : - n ^ 2 = - ( -1) ^2 = -1 so the answer is -1 :))
i hope this be helpful 
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Where are the functions?

It is 2 out of 8 she will pick green and 3 out of 7 she will pick green but red and green would be 5 out of 5 so 50% chance