表达式3: "y" less than or equal to .1sine ( pi ( "x" plus "t" ) ) negative .2y≤.1sin(π(x+t))−.2
3
表达式4: negative .2sine ( 2 thirds pi ( "x" plus .5sine ( StartFraction, pi Over 3 , EndFraction ( "x" plus 3 "t" ) ) ) ) positive .1−.2sin(23π(x+.5sin(π3(x+3t))))+.1
4
表达式5: "t" equals 0.5 9 5t=0.595
negative 10−10
1010
5
表达式6: "c" equals rgb left parenthesis, 87 , 87 , 87 , right parenthesisc=rgb87,87,87
