\[ \int x^2 \text {FresnelC}(b x) \, dx \]
Optimal antiderivative \[ -\frac {2 \cos \left (\frac {b^{2} \pi \,x^{2}}{2}\right )}{3 b^{3} \pi ^{2}}+\frac {x^{3} \FresnelC \left (b x \right )}{3}-\frac {x^{2} \sin \left (\frac {b^{2} \pi \,x^{2}}{2}\right )}{3 b \pi } \]
command
integrate(x^2*fresnel_cos(b*x),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \frac {\pi ^{2} b^{3} x^{3} \operatorname {C}\left (b x\right ) - \pi b^{2} x^{2} \sin \left (\frac {1}{2} \, \pi b^{2} x^{2}\right ) - 2 \, \cos \left (\frac {1}{2} \, \pi b^{2} x^{2}\right )}{3 \, \pi ^{2} b^{3}} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (x^{2} {\rm fresnelc}\left (b x\right ), x\right ) \]