運算式 13: "y" equals 4 left brace, "x" less than negative 2 , right brace left brace, "x" greater than negative 4 , right bracey=4x<−2x>−4
13
運算式 14: "x" equals negative 2 left brace, "y" greater than 2 , right brace left brace, "y" less than 4 , right bracex=−2y>2y<4
14
運算式 15: "y" equals 2 left brace, "x" greater than negative 4 , right brace left brace, "x" less than negative 2 , right bracey=2x>−4x<−2
15
運算式 16: "x" equals negative 4 left brace, "y" greater than 2 , right brace left brace, "y" less than 4 , right bracex=−4y>2y<4
16
運算式 17: "y" equals 3 left brace, "x" greater than 2 , right brace left brace, "x" less than 4 , right bracey=3x>2x<4
17
運算式 18: "x" equals 3 left brace, "y" greater than 2 , right brace left brace, "y" less than 4 , right bracex=3y>2y<4
18
運算式 19: "y" equals 3 left brace, "x" less than negative 2 , right brace left brace, "x" greater than negative 4 , right bracey=3x<−2x>−4
19
運算式 20: "x" equals negative 3 left brace, "y" less than 4 , right brace left brace, "y" greater than 2 , right bracex=−3y<4y>2
20
運算式 21: "x" equals negative 10 left brace, "y" greater than negative 4 , right brace left brace, "y" less than 1 , right bracex=−10y>−4y<1
21
運算式 22: "x" equals negative 12 left brace, "y" greater than negative 4 , right brace left brace, "y" less than 1 , right bracex=−12y>−4y<1
22
運算式 23: "y" equals 1 left brace, "x" less than negative 8 , right brace left brace, "x" greater than negative 14 , right bracey=1x<−8x>−14
23
運算式 24: "y" equals 15 plus 1 "x" left brace, "x" greater than negative 14 , right brace left brace, "y" less than 4 , right bracey=15+1xx>−14y<4
24
運算式 25: "y" equals negative 7 minus 1 "x" left brace, "x" greater than negative 11 , right brace left brace, "y" greater than 1 , right bracey=−7−1xx>−11y>1
25
運算式 26: "y" equals negative 4 left brace, "x" greater than negative 12 , right brace left brace, "x" less than negative 10 , right bracey=−4x>−12x<−10
