Expression 2: cosine left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, cos left parenthesis, left parenthesis, "x" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesiscoscoscoscoscoscoscoscoscoscoscoscoscoscoscosx