Expression 3: 0.6 left parenthesis, sin left parenthesis, 2 times pi times "f" Subscript, 2 , Baseline times "x" plus 10 , right parenthesis plus 1 quarter cos left parenthesis, 2 times 2 times pi times "f" Subscript, 2 , Baseline times "x" plus 10 , right parenthesis plus 1 half cos left parenthesis, 3 times 2 times pi times "f" Subscript, 2 , Baseline times "x" plus 10 , right parenthesis plus 1 fifth cos left parenthesis, 5 times 2 times pi times "f" Subscript, 2 , Baseline times "x" plus 10 , right parenthesis plus 1 fifth cos left parenthesis, 6 times 2 times pi times "f" Subscript, 2 , Baseline times "x" plus 10 , right parenthesis , right parenthesis0.6sin2·π·f2·x+10+14cos2·2·π·f2·x+10+12cos3·2·π·f2·x+10+15cos5·2·π·f2·x+10+15cos6·2·π·f2·x+10
3
Expression 4: sine left parenthesis, 2 times pi times "f" Subscript, 1 , Baseline times "x" , right parenthesis plus 1 quarter cosine left parenthesis, 2 times 2 times pi times "f" Subscript, 1 , Baseline times "x" , right parenthesis plus 1 half cosine left parenthesis, 3 times 2 times pi times "f" Subscript, 1 , Baseline times "x" , right parenthesis plus 1 fifth cosine left parenthesis, 5 times 2 times pi times "f" Subscript, 1 , Baseline times "x" , right parenthesis plus 1 fifth cosine left parenthesis, 6 times 2 times pi times "f" Subscript, 1 , Baseline times "x" , right parenthesissin2·π·f1·x+14cos2·2·π·f1·x+12cos3·2·π·f1·x+15cos5·2·π·f1·x+15cos6·2·π·f1·x