P1: left parenthesis, "S" Subscript, 1 , Baseline , "P" left parenthesis, "S" Subscript, 1 , Baseline , right parenthesis , right parenthesisS1,PS1
Label:
6
P2: left parenthesis, "S" Subscript, 2 , Baseline , "P" left parenthesis, "S" Subscript, 2 , Baseline , right parenthesis , right parenthesisS2,PS2
Label:
7
Expression 8: 0 less than or equal to "y" less than or equal to "P" left parenthesis, "x" , right parenthesis left brace, "S" Subscript, 1 , Baseline less than or equal to "x" less than or equal to "S" Subscript, 2 , Baseline , right brace0≤y≤PxS1≤x≤S2