Hidden Label: "P" left bracket, "n" plus 2 , right bracketPn+2
Label
4
Expression 5: "s" left parenthesis, "x" , right parenthesis equals left brace, mod left parenthesis, "x" , 4 , right parenthesis equals 0 : 1 , left brace, mod left parenthesis, "x" , 4 , right parenthesis equals 2 : negative 1 , 0 , right brace , right bracesx=modx,4=0:1,modx,4=2:−1,0
5
Expression 6: "x" squared plus "y" squared equals 1x2+y2=1