Expression 3: StartFraction, 1 Over "a" plus 1 , EndFraction less than or equal to "y" less than or equal to StartFraction, 1 Over "x" , EndFraction left brace, "a" less than "x" less than or equal to "a" plus 1 , right brace1a+1≤y≤1xa<x≤a+1
3
Expression 4: "a" equals left bracket, 1 , ...1 0 , right bracketa=1,...10