Expresión 3: 0 less than "y" less than "f" left parenthesis, "x" , right parenthesis left brace, "a" less than "x" less than "b" , right brace0<y<fxa<x<b
3
Expresión 4: "b" equals StartFraction, pi Over 2 , EndFractionb=π2
4
Expresión 5: "a" equals 0a=0
5
Expresión 6: StartFraction, pi Over 2 , EndFractionπ2