Expression 7: "x" squared plus left parenthesis, "y" minus 7.5 , right parenthesis squared less than or equal to 1x2+y−7.52≤1
7
Expression 8: left parenthesis, "x" plus 7 , right parenthesis squared plus "y" squared less than or equal to 1x+72+y2≤1
8
Expression 9: left parenthesis, "x" plus 5 , right parenthesis squared plus left parenthesis, "y" plus 2 , right parenthesis squared less than or equal to 1x+52+y+22≤1
9
Expression 10: left parenthesis, "x" plus 3 , right parenthesis squared plus left parenthesis, "y" minus 2 , right parenthesis squared less than or equal to 1x+32+y−22≤1
10
Expression 11: left parenthesis, "x" minus 3 , right parenthesis squared plus left parenthesis, "y" minus 3 , right parenthesis squared less than or equal to 1x−32+y−32≤1
11
Expression 12: left parenthesis, "x" minus 5 , right parenthesis squared plus left parenthesis, "y" plus 3 , right parenthesis squared less than or equal to 1x−52+y+32≤1
12
Expression 13: "y" equals "a" left parenthesis, "x" plus 7 , right parenthesis left parenthesis, "x" plus 3.5 , right parenthesis left parenthesis, "x" minus 4 , right parenthesis left parenthesis, "x" plus 5 , right parenthesisy=ax+7x+3.5x−4x+5