表达式3: 0 less than or equal to "y" less than or equal to "m" left parenthesis, "t" , right parenthesis left brace, 0 less than "x" less than "w" , right brace0≤y≤mt0<x<w
3
表达式4: "t" equals 27.7 3 2t=27.732
00
6060
4
表达式5: "m" left parenthesis, "z" , right parenthesis equals StartFraction, 60 "w" minus "w" "z" Over 60 , EndFractionmz=60w−wz60
