Expression 5: "f" Subscript, 3 , Baseline left parenthesis, "x" , "y" , right parenthesis equals max left parenthesis, 0 , "T" Subscript, "A" "B" , Baseline minus StartRoot, left parenthesis, mod left parenthesis, "f" Subscript, 4 , Baseline left parenthesis, "x" , "y" , right parenthesis plus "O" Subscript, "F" "F" "S" "E" "T" , Baseline "f" Subscript, 0 , Baseline left parenthesis, "y" minus 0.5 , "x" , right parenthesis , 1 , right parenthesis minus 0.5 , right parenthesis squared plus left parenthesis, mod left parenthesis, "f" Subscript, 4 , Baseline left parenthesis, "y" , "x" , right parenthesis minus 0.5 , 1 , right parenthesis minus 0.5 , right parenthesis squared , EndRoot minus "f" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis , right parenthesisf3x,y=max0,TAB−modf4x,y+OFFSETf0y−0.5,x,1−0.52+modf4y,x−0.5,1−0.52−f1x,y
5
Expression 6: "f" left parenthesis, "x" , "y" , right parenthesis equals "f" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis plus "f" Subscript, 2 , Baseline left parenthesis, "x" , "y" , right parenthesis plus "f" Subscript, 3 , Baseline left parenthesis, "x" , "y" , right parenthesisfx,y=f1x,y+f2x,y+f3x,y
6
Expression 7: 0 equals "f" left parenthesis, "x" , "y" , right parenthesis0=fx,y