Expression 3: sine left parenthesis, StartAbsoluteValue, "a" , EndAbsoluteValue squared minus "b" , right parenthesis cosine left parenthesis, StartAbsoluteValue, "a" , EndAbsoluteValue squared minus "b" , right parenthesis less than or equal to negative "k" left parenthesis, "x" squared plus "y" squared , right parenthesissina2−bcosa2−b≤−kx2+y2
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