Expression 2: floor left parenthesis, StartFraction, "y" Over 2 , EndFraction , right parenthesis plus 1 equals "x" left brace, 2 "x" minus 1 less than "y" , right bracefloory2+1=x2x−1<y
2
Expression 3: "x" equals negative left parenthesis, left parenthesis, mod left parenthesis, floor left parenthesis, "y" , right parenthesis , 2 , right parenthesis minus 1 , right parenthesis mod left parenthesis, "y" , 2 , right parenthesis minus floor left parenthesis, StartFraction, left parenthesis, "y" plus 1 , right parenthesis Over 2 , EndFraction , right parenthesis , right parenthesisx=−modfloory,2−1mody,2−floory+12