Expression 5: "T" left parenthesis, "x" , "y" , right parenthesis equals arc tangent left parenthesis, "y" , "x" , right parenthesisTx,y=arctany,x
5
Expression 6: "d" left parenthesis, "x" , "y" , right parenthesis equals StartRoot, "x" squared plus "y" squared , EndRootdx,y=x2+y2
6
Expression 7: sine squared left parenthesis, StartFraction, "T" left parenthesis, "x" , "y" , right parenthesis "D" left parenthesis, round left parenthesis, "d" left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis Over 2 , EndFraction , right parenthesis plus sine squared left parenthesis, pi "d" left parenthesis, "x" , "y" , right parenthesis , right parenthesis less than or equal to .5 left brace, "d" left parenthesis, "x" , "y" , right parenthesis plus .5 less than "M" , right bracesin2Tx,yDrounddx,y2+sin2πdx,y≤.5dx,y+.5<M