表达式30: left parenthesis, 5 , negative 5 , right parenthesis5,−5
30
表达式31: 0 less than "y" less than "D" Subscript, "b" , Baseline left brace, 20 less than "x" less than 30 , right brace0<y<Db20<x<30
31
表达式32: 0 less than "y" less than "d" Subscript, "b" , Baseline left brace, 20 less than "x" less than 30 , right brace0<y<db20<x<30
32
表达式33: "d" Subscript, "b" , Baseline less than "y" less than "P" Subscript, "b" , Baseline plus "d" Subscript, "b" , Baseline left brace, 20 less than "x" less than 30 , right bracedb<y<Pb+db20<x<30
33
表达式34: left parenthesis, 25 , "D" Subscript, "b" , Baseline , right parenthesis25,Db
34
表达式35: left parenthesis, 25 , "d" Subscript, "b" , Baseline plus "P" Subscript, "b" , Baseline , right parenthesis25,db+Pb
35
表达式36: left parenthesis, 25 , "d" Subscript, "b" , Baseline , right parenthesis25,db
36
表达式37: left parenthesis, 25 , negative 5 , right parenthesis25,−5
37
表达式38: 0 less than "y" less than "D" Subscript, "c" , Baseline left brace, 40 less than "x" less than 50 , right brace0<y<Dc40<x<50
38
表达式39: 0 less than "y" less than "d" Subscript, "c" , Baseline left brace, 40 less than "x" less than 50 , right brace0<y<dc40<x<50
39
表达式40: "d" Subscript, "c" , Baseline less than "y" less than "P" Subscript, "c" , Baseline plus "d" Subscript, "c" , Baseline left brace, 40 less than "x" less than 50 , right bracedc<y<Pc+dc40<x<50
40
表达式41: left parenthesis, 45 , "D" Subscript, "c" , Baseline , right parenthesis45,Dc
41
表达式42: left parenthesis, 45 , "d" Subscript, "c" , Baseline , right parenthesis45,dc
42
表达式43: left parenthesis, 45 , "d" Subscript, "c" , Baseline plus "P" Subscript, "c" , Baseline , right parenthesis45,dc+Pc
43
表达式44: left parenthesis, 45 , negative 5 , right parenthesis45,−5
44
表达式45: 0 less than "y" less than "D" Subscript, "d" , Baseline left brace, 60 less than "x" less than 70 , right brace0<y<Dd60<x<70
45
表达式46: 0 less than "y" less than "d" Subscript, "d" , Baseline left brace, 60 less than "x" less than 70 , right brace0<y<dd60<x<70
46
表达式47: "d" Subscript, "d" , Baseline less than "y" less than "P" Subscript, "d" , Baseline positive "d" Subscript, "d" , Baseline left brace, 60 less than "x" less than 70 , right bracedd<y<Pd+dd60<x<70
47
表达式48: left parenthesis, 65 , "D" Subscript, "d" , Baseline , right parenthesis65,Dd
48
表达式49: left parenthesis, 65 , "d" Subscript, "d" , Baseline , right parenthesis65,dd
49
表达式50: left parenthesis, 65 , "d" Subscript, "d" , Baseline plus "P" Subscript, "d" , Baseline , right parenthesis65,dd+Pd
50
表达式51: left parenthesis, 65 , negative 5 , right parenthesis65,−5
51
表达式52: "r" Subscript, "a" , Baseline equals "d" Subscript, "a" , Baseline times 100 / "D" Subscript, "a" , Baselinera=da·100/Da
