Optimal. Leaf size=144 \[ -\frac {\sqrt [4]{-1} e^{\frac {1}{4} i \left (4 a+\frac {(1+i b)^2}{c}\right )} \sqrt {\pi } \text {Erf}\left (\frac {\sqrt [4]{-1} (1+i b+2 i c x)}{2 \sqrt {c}}\right )}{4 \sqrt {c}}+\frac {\sqrt [4]{-1} e^{-i a+\frac {i (i+b)^2}{4 c}} \sqrt {\pi } \text {Erfi}\left (\frac {\sqrt [4]{-1} (1-i b-2 i c x)}{2 \sqrt {c}}\right )}{4 \sqrt {c}} \]
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Rubi [A]
time = 0.14, antiderivative size = 144, normalized size of antiderivative = 1.00, number of steps
used = 6, number of rules used = 4, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.267, Rules used = {4561, 2266,
2235, 2236} \begin {gather*} \frac {\sqrt [4]{-1} \sqrt {\pi } e^{\frac {i (b+i)^2}{4 c}-i a} \text {Erfi}\left (\frac {\sqrt [4]{-1} (-i b-2 i c x+1)}{2 \sqrt {c}}\right )}{4 \sqrt {c}}-\frac {\sqrt [4]{-1} \sqrt {\pi } e^{\frac {1}{4} i \left (4 a+\frac {(1+i b)^2}{c}\right )} \text {Erf}\left (\frac {\sqrt [4]{-1} (i b+2 i c x+1)}{2 \sqrt {c}}\right )}{4 \sqrt {c}} \end {gather*}
Antiderivative was successfully verified.
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Rule 2235
Rule 2236
Rule 2266
Rule 4561
Rubi steps
\begin {align*} \int e^x \cos \left (a+b x+c x^2\right ) \, dx &=\int \left (\frac {1}{2} e^{-i a+(1-i b) x-i c x^2}+\frac {1}{2} e^{i a+(1+i b) x+i c x^2}\right ) \, dx\\ &=\frac {1}{2} \int e^{-i a+(1-i b) x-i c x^2} \, dx+\frac {1}{2} \int e^{i a+(1+i b) x+i c x^2} \, dx\\ &=\frac {1}{2} e^{\frac {1}{4} i \left (4 a+\frac {(1+i b)^2}{c}\right )} \int e^{-\frac {i (1+i b+2 i c x)^2}{4 c}} \, dx+\frac {1}{2} e^{-\frac {i \left (1-2 i b-b^2+4 a c\right )}{4 c}} \int e^{\frac {i (1-i b-2 i c x)^2}{4 c}} \, dx\\ &=-\frac {\sqrt [4]{-1} e^{\frac {1}{4} i \left (4 a+\frac {(1+i b)^2}{c}\right )} \sqrt {\pi } \text {erf}\left (\frac {\sqrt [4]{-1} (1+i b+2 i c x)}{2 \sqrt {c}}\right )}{4 \sqrt {c}}+\frac {\sqrt [4]{-1} e^{-\frac {i \left (1-2 i b-b^2+4 a c\right )}{4 c}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt [4]{-1} (1-i b-2 i c x)}{2 \sqrt {c}}\right )}{4 \sqrt {c}}\\ \end {align*}
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Mathematica [A]
time = 0.25, size = 135, normalized size = 0.94 \begin {gather*} \frac {\sqrt [4]{-1} e^{-\frac {i \left (1-2 i b+b^2\right )}{4 c}} \sqrt {\pi } \left (-e^{\frac {i b^2}{2 c}} \text {Erfi}\left (\frac {(-1)^{3/4} (i+b+2 c x)}{2 \sqrt {c}}\right ) (\cos (a)-i \sin (a))+e^{\left .\frac {i}{2}\right /c} \text {Erfi}\left (\frac {\sqrt [4]{-1} (-i+b+2 c x)}{2 \sqrt {c}}\right ) (-i \cos (a)+\sin (a))\right )}{4 \sqrt {c}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.14, size = 117, normalized size = 0.81
method | result | size |
risch | \(\frac {\sqrt {\pi }\, {\mathrm e}^{-\frac {i \left (4 a c -b^{2}-2 i b +1\right )}{4 c}} \erf \left (\sqrt {i c}\, x -\frac {-i b +1}{2 \sqrt {i c}}\right )}{4 \sqrt {i c}}-\frac {\sqrt {\pi }\, {\mathrm e}^{\frac {i \left (4 a c -b^{2}+2 i b +1\right )}{4 c}} \erf \left (-\sqrt {-i c}\, x +\frac {i b +1}{2 \sqrt {-i c}}\right )}{4 \sqrt {-i c}}\) | \(117\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.28, size = 131, normalized size = 0.91 \begin {gather*} -\frac {\sqrt {2} \sqrt {\pi } {\left ({\left (-\left (i - 1\right ) \, \cos \left (-\frac {b^{2} - 4 \, a c - 1}{4 \, c}\right ) - \left (i + 1\right ) \, \sin \left (-\frac {b^{2} - 4 \, a c - 1}{4 \, c}\right )\right )} \operatorname {erf}\left (\frac {i \, {\left (2 i \, c x + i \, b - 1\right )} \sqrt {i \, c}}{2 \, c}\right ) + {\left (\left (i + 1\right ) \, \cos \left (-\frac {b^{2} - 4 \, a c - 1}{4 \, c}\right ) + \left (i - 1\right ) \, \sin \left (-\frac {b^{2} - 4 \, a c - 1}{4 \, c}\right )\right )} \operatorname {erf}\left (\frac {i \, {\left (2 i \, c x + i \, b + 1\right )} \sqrt {-i \, c}}{2 \, c}\right )\right )} e^{\left (-\frac {b}{2 \, c}\right )}}{8 \, \sqrt {c}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] Both result and optimal contain complex but leaf count of result is larger than twice
the leaf count of optimal. 229 vs. \(2 (91) = 182\).
time = 3.24, size = 229, normalized size = 1.59 \begin {gather*} \frac {\sqrt {2} \pi \sqrt {\frac {c}{\pi }} e^{\left (\frac {i \, b^{2} - 4 i \, a c - 2 \, b - i}{4 \, c}\right )} \operatorname {C}\left (\frac {\sqrt {2} {\left (2 \, c x + b + i\right )} \sqrt {\frac {c}{\pi }}}{2 \, c}\right ) - \sqrt {2} \pi \sqrt {\frac {c}{\pi }} e^{\left (\frac {-i \, b^{2} + 4 i \, a c - 2 \, b + i}{4 \, c}\right )} \operatorname {C}\left (-\frac {\sqrt {2} {\left (2 \, c x + b - i\right )} \sqrt {\frac {c}{\pi }}}{2 \, c}\right ) - i \, \sqrt {2} \pi \sqrt {\frac {c}{\pi }} e^{\left (\frac {i \, b^{2} - 4 i \, a c - 2 \, b - i}{4 \, c}\right )} \operatorname {S}\left (\frac {\sqrt {2} {\left (2 \, c x + b + i\right )} \sqrt {\frac {c}{\pi }}}{2 \, c}\right ) - i \, \sqrt {2} \pi \sqrt {\frac {c}{\pi }} e^{\left (\frac {-i \, b^{2} + 4 i \, a c - 2 \, b + i}{4 \, c}\right )} \operatorname {S}\left (-\frac {\sqrt {2} {\left (2 \, c x + b - i\right )} \sqrt {\frac {c}{\pi }}}{2 \, c}\right )}{4 \, c} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int e^{x} \cos {\left (a + b x + c x^{2} \right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.42, size = 147, normalized size = 1.02 \begin {gather*} -\frac {\sqrt {2} \sqrt {\pi } \operatorname {erf}\left (-\frac {1}{4} \, \sqrt {2} {\left (2 \, x + \frac {b - i}{c}\right )} {\left (-\frac {i \, c}{{\left | c \right |}} + 1\right )} \sqrt {{\left | c \right |}}\right ) e^{\left (-\frac {i \, b^{2} - 4 i \, a c + 2 \, b - i}{4 \, c}\right )}}{4 \, {\left (-\frac {i \, c}{{\left | c \right |}} + 1\right )} \sqrt {{\left | c \right |}}} - \frac {\sqrt {2} \sqrt {\pi } \operatorname {erf}\left (-\frac {1}{4} \, \sqrt {2} {\left (2 \, x + \frac {b + i}{c}\right )} {\left (\frac {i \, c}{{\left | c \right |}} + 1\right )} \sqrt {{\left | c \right |}}\right ) e^{\left (-\frac {-i \, b^{2} + 4 i \, a c + 2 \, b + i}{4 \, c}\right )}}{4 \, {\left (\frac {i \, c}{{\left | c \right |}} + 1\right )} \sqrt {{\left | c \right |}}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int {\mathrm {e}}^x\,\cos \left (c\,x^2+b\,x+a\right ) \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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