運算式 7: "y" equals negative 3.5 left brace, "x" greater than negative 1 , right brace left brace, "x" less than 1 , right bracey=−3.5x>−1x<1
7
運算式 8: "y" less than or equal to negative 2 "x" minus 1.2 left brace, "x" greater than 1 , right brace left brace, "x" less than 1.8 , right bracey≤−2x−1.2x>1x<1.8
8
運算式 9: "y" less than or equal to 2 "x" minus 1.4 left brace, "x" less than negative 1 , right brace left brace, "x" greater than negative 1.7 , right bracey≤2x−1.4x<−1x>−1.7
9
運算式 10: 2.5 greater than left parenthesis, "x" plus 0.9 , right parenthesis squared plus left parenthesis, "y" plus 2.6 , right parenthesis squared left brace, "y" greater than negative 3 , right brace left brace, "x" less than negative 1.5 , right brace2.5>x+0.92+y+2.62y>−3x<−1.5
10
運算式 11: 2.5 greater than left parenthesis, "x" minus 0.9 5 , right parenthesis squared plus left parenthesis, "y" plus 2.4 5 , right parenthesis squared left brace, "y" greater than negative 3 , right brace left brace, "x" greater than 1.5 , right brace2.5>x−0.952+y+2.452y>−3x>1.5
11
運算式 12: "y" greater than 2.5 "x" minus 9 left brace, "y" greater than negative 4.7 , right brace left brace, "y" less than negative 3 , right brace left brace, "y" greater than negative 2 "x" minus 1.5 , right bracey>2.5x−9y>−4.7y<−3y>−2x−1.5
12
運算式 13: "y" greater than negative 2.5 "x" minus 9 left brace, "y" greater than negative 4.7 , right brace left brace, "y" less than negative 3 , right brace left brace, "y" greater than 2 "x" minus 1.7 , right bracey>−2.5x−9y>−4.7y<−3y>2x−1.7