Expression 4: "n" Subscript, "u" "m" "l" "i" "n" "e" "s" , Baseline equals 5numlines=5
11
1515
4
Calculations
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5
Expression 8: "f" left parenthesis, "x" , "y" , right parenthesis equals 4sine left parenthesis, "x" , right parenthesis plus 4cosine left parenthesis, "y" , right parenthesisfx,y=4sinx+4cosy
8
Expression 9: "f" left parenthesis, "x" , "y" , right parenthesis minus "c" equals 0fx,y−c=0