表达式22: left parenthesis, "x" minus 2.5 , right parenthesis squared plus left parenthesis, "y" minus 1 , right parenthesis squared less than 1 squaredx−2.52+y−12<12
22
表达式23: "f" left parenthesis, "x" , right parenthesis equals negative StartRoot, 50 minus left parenthesis, "x" minus 17 , right parenthesis squared , EndRoot plus 0fx=−50−x−172+0