Expression 5: sine left parenthesis, "f" Subscript, 0 , Baseline times "x" plus 2 times sin left parenthesis, "f" Subscript, 1 , Baseline times "x" plus "p" Subscript, 1 , Baseline , right parenthesis plus "p" Subscript, 0 , Baseline , right parenthesissinf0·x+2·sinf1·x+p1+p0