Integrand size = 19, antiderivative size = 172 \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=-\frac {e^{-i d+\frac {(e+i b \log (f))^2}{4 c \log (f)}} f^a \sqrt {\pi } \text {erfi}\left (\frac {i e-b \log (f)-2 c x \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}}+\frac {e^{i d+\frac {(e-i b \log (f))^2}{4 c \log (f)}} f^a \sqrt {\pi } \text {erfi}\left (\frac {i e+b \log (f)+2 c x \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}} \]
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Time = 0.33 (sec) , antiderivative size = 172, normalized size of antiderivative = 1.00, number of steps used = 8, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.211, Rules used = {4561, 2325, 2266, 2235} \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=\frac {\sqrt {\pi } f^a e^{\frac {(e-i b \log (f))^2}{4 c \log (f)}+i d} \text {erfi}\left (\frac {b \log (f)+2 c x \log (f)+i e}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}}-\frac {\sqrt {\pi } f^a e^{\frac {(e+i b \log (f))^2}{4 c \log (f)}-i d} \text {erfi}\left (\frac {-b \log (f)-2 c x \log (f)+i e}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}} \]
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Rule 2235
Rule 2266
Rule 2325
Rule 4561
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {1}{2} e^{-i d-i e x} f^{a+b x+c x^2}+\frac {1}{2} e^{i d+i e x} f^{a+b x+c x^2}\right ) \, dx \\ & = \frac {1}{2} \int e^{-i d-i e x} f^{a+b x+c x^2} \, dx+\frac {1}{2} \int e^{i d+i e x} f^{a+b x+c x^2} \, dx \\ & = \frac {1}{2} \int \exp \left (-i d+a \log (f)+c x^2 \log (f)-x (i e-b \log (f))\right ) \, dx+\frac {1}{2} \int \exp \left (i d+a \log (f)+c x^2 \log (f)+x (i e+b \log (f))\right ) \, dx \\ & = \frac {1}{2} \left (e^{i d+\frac {(e-i b \log (f))^2}{4 c \log (f)}} f^a\right ) \int \exp \left (\frac {(i e+b \log (f)+2 c x \log (f))^2}{4 c \log (f)}\right ) \, dx+\frac {1}{2} \left (e^{-i d+\frac {(e+i b \log (f))^2}{4 c \log (f)}} f^a\right ) \int \exp \left (\frac {(-i e+b \log (f)+2 c x \log (f))^2}{4 c \log (f)}\right ) \, dx \\ & = -\frac {e^{-i d+\frac {(e+i b \log (f))^2}{4 c \log (f)}} f^a \sqrt {\pi } \text {erfi}\left (\frac {i e-b \log (f)-2 c x \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}}+\frac {e^{i d+\frac {(e-i b \log (f))^2}{4 c \log (f)}} f^a \sqrt {\pi } \text {erfi}\left (\frac {i e+b \log (f)+2 c x \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right )}{4 \sqrt {c} \sqrt {\log (f)}} \\ \end{align*}
Time = 0.24 (sec) , antiderivative size = 151, normalized size of antiderivative = 0.88 \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=\frac {e^{\frac {e (e-2 i b \log (f))}{4 c \log (f)}} f^{a-\frac {b^2}{4 c}} \sqrt {\pi } \left (e^{\frac {i b e}{c}} \text {erfi}\left (\frac {-i e+(b+2 c x) \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right ) (\cos (d)-i \sin (d))+\text {erfi}\left (\frac {i e+(b+2 c x) \log (f)}{2 \sqrt {c} \sqrt {\log (f)}}\right ) (\cos (d)+i \sin (d))\right )}{4 \sqrt {c} \sqrt {\log (f)}} \]
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Time = 0.48 (sec) , antiderivative size = 170, normalized size of antiderivative = 0.99
method | result | size |
risch | \(-\frac {\sqrt {\pi }\, f^{a} f^{-\frac {b^{2}}{4 c}} {\mathrm e}^{\frac {2 i \ln \left (f \right ) b e -4 i d \ln \left (f \right ) c +e^{2}}{4 \ln \left (f \right ) c}} \operatorname {erf}\left (-\sqrt {-c \ln \left (f \right )}\, x +\frac {b \ln \left (f \right )-i e}{2 \sqrt {-c \ln \left (f \right )}}\right )}{4 \sqrt {-c \ln \left (f \right )}}-\frac {\sqrt {\pi }\, f^{a} f^{-\frac {b^{2}}{4 c}} {\mathrm e}^{-\frac {2 i \ln \left (f \right ) b e -4 i d \ln \left (f \right ) c -e^{2}}{4 \ln \left (f \right ) c}} \operatorname {erf}\left (-\sqrt {-c \ln \left (f \right )}\, x +\frac {i e +b \ln \left (f \right )}{2 \sqrt {-c \ln \left (f \right )}}\right )}{4 \sqrt {-c \ln \left (f \right )}}\) | \(170\) |
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Time = 0.25 (sec) , antiderivative size = 176, normalized size of antiderivative = 1.02 \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=-\frac {\sqrt {\pi } \sqrt {-c \log \left (f\right )} \operatorname {erf}\left (\frac {{\left ({\left (2 \, c x + b\right )} \log \left (f\right ) - i \, e\right )} \sqrt {-c \log \left (f\right )}}{2 \, c \log \left (f\right )}\right ) e^{\left (-\frac {{\left (b^{2} - 4 \, a c\right )} \log \left (f\right )^{2} - e^{2} + 2 \, {\left (2 i \, c d - i \, b e\right )} \log \left (f\right )}{4 \, c \log \left (f\right )}\right )} + \sqrt {\pi } \sqrt {-c \log \left (f\right )} \operatorname {erf}\left (\frac {{\left ({\left (2 \, c x + b\right )} \log \left (f\right ) + i \, e\right )} \sqrt {-c \log \left (f\right )}}{2 \, c \log \left (f\right )}\right ) e^{\left (-\frac {{\left (b^{2} - 4 \, a c\right )} \log \left (f\right )^{2} - e^{2} + 2 \, {\left (-2 i \, c d + i \, b e\right )} \log \left (f\right )}{4 \, c \log \left (f\right )}\right )}}{4 \, c \log \left (f\right )} \]
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\[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=\int f^{a + b x + c x^{2}} \cos {\left (d + e x \right )}\, dx \]
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Result contains higher order function than in optimal. Order 9 vs. order 4.
Time = 0.25 (sec) , antiderivative size = 354, normalized size of antiderivative = 2.06 \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=-\frac {\sqrt {\pi } {\left (f^{a} {\left (\cos \left (-\frac {2 \, c d - b e}{2 \, c}\right ) - i \, \sin \left (-\frac {2 \, c d - b e}{2 \, c}\right )\right )} \operatorname {erf}\left (x \overline {\sqrt {-c \log \left (f\right )}} - \frac {1}{2} \, {\left (b \log \left (f\right ) + i \, e\right )} \overline {\frac {1}{\sqrt {-c \log \left (f\right )}}}\right ) e^{\left (\frac {e^{2}}{4 \, c \log \left (f\right )}\right )} + f^{a} {\left (\cos \left (-\frac {2 \, c d - b e}{2 \, c}\right ) + i \, \sin \left (-\frac {2 \, c d - b e}{2 \, c}\right )\right )} \operatorname {erf}\left (x \overline {\sqrt {-c \log \left (f\right )}} - \frac {1}{2} \, {\left (b \log \left (f\right ) - i \, e\right )} \overline {\frac {1}{\sqrt {-c \log \left (f\right )}}}\right ) e^{\left (\frac {e^{2}}{4 \, c \log \left (f\right )}\right )} + f^{a} {\left (\cos \left (-\frac {2 \, c d - b e}{2 \, c}\right ) - i \, \sin \left (-\frac {2 \, c d - b e}{2 \, c}\right )\right )} \operatorname {erf}\left (\frac {{\left (2 \, c x \log \left (f\right ) + b \log \left (f\right ) + i \, e\right )} \sqrt {-c \log \left (f\right )}}{2 \, c \log \left (f\right )}\right ) e^{\left (\frac {e^{2}}{4 \, c \log \left (f\right )}\right )} + f^{a} {\left (\cos \left (-\frac {2 \, c d - b e}{2 \, c}\right ) + i \, \sin \left (-\frac {2 \, c d - b e}{2 \, c}\right )\right )} \operatorname {erf}\left (\frac {{\left (2 \, c x \log \left (f\right ) + b \log \left (f\right ) - i \, e\right )} \sqrt {-c \log \left (f\right )}}{2 \, c \log \left (f\right )}\right ) e^{\left (\frac {e^{2}}{4 \, c \log \left (f\right )}\right )}\right )} \sqrt {-c \log \left (f\right )}}{8 \, c f^{\frac {b^{2}}{4 \, c}} \log \left (f\right )} \]
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\[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=\int { f^{c x^{2} + b x + a} \cos \left (e x + d\right ) \,d x } \]
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Timed out. \[ \int f^{a+b x+c x^2} \cos (d+e x) \, dx=\int f^{c\,x^2+b\,x+a}\,\cos \left (d+e\,x\right ) \,d x \]
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