Expresión 3: "d" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis equals 1.0 9 5 times left bracket, "e" Superscript, negative StartFraction, "x" Over 4 , EndFraction , Baseline left parenthesis, 0.7 1 7cos left parenthesis, 1.9 8 "x" , right parenthesis plus 0.1 0 3sin left parenthesis, 1.9 8 "x" , right parenthesis , right parenthesis plus 0.1 9 3 1 5 plus 0.0 8 7 8 2cos left parenthesis, pi "x" , right parenthesis minus 0.0 2 3 5sin left parenthesis, pi "x" , right parenthesis plus 0.0 0 1 3 2cos left parenthesis, 2 pi "x" , right parenthesis minus 0.0 0 0 1 1 6 9sin left parenthesis, 2 pi "x" , right parenthesis plus 0.0 0 0 7 8 2 7cos left parenthesis, 3 pi "x" , right parenthesis minus 0.0 0 0 0 4 3 5sin left parenthesis, 3 pi "x" , right parenthesis plus .0 0 0 0 8 0 4 3 0 6cos left parenthesis, 4 pi "x" , right parenthesis minus .0 0 0 0 0 3 2 8 3 4sin left parenthesis, 4 pi "x" , right parenthesis , right bracket minus 0.8 9 4 "x" "e" Superscript, negative 3 "x" , Baselined2x=1.095·e−x40.717cos1.98x+0.103sin1.98x+0.19315+0.08782cosπx−0.0235sinπx+0.00132cos2πx−0.0001169sin2πx+0.0007827cos3πx−0.0000435sin3πx+.0000804306cos4πx−.0000032834sin4πx−0.894xe−3x