Expression 2: "x" minus "y" greater than or equal to 0x−y≥0
2
Expression 3: "a" equals 7a=7
11
4040
3
Expression 4: "e" Superscript, left parenthesis, 1 minus "x" , right parenthesis , Baseline plus "e" Superscript, left parenthesis, 1 plus "y" , right parenthesis , Baseline equals "a"e1−x+e1+y=a