Revision 43bba6b2-2ec3-4ed1-a1cb-395df49f390f - Code Golf Stack Exchange

# JavaScript (ES6), 88 bytes

Expects `(u)(v)`.

_Disclaimer: Either that's correct, or I completely misunderstood the challenge._

<!-- language-all: lang-javascript -->

 u=>v=>[1,2,4].reduce((p,i)=>p.map(n=>n+u[i%=7]*v[j%=7]-u[j++]*v[i++],j=i*3),u.map(_=>0))

[Try it online!][TIO-mdnedjd0]

[JavaScript (Node.js)]: https://nodejs.org
[TIO-mdnedjd0]: https://tio.run/##nVJNb9swDL3nV7ACBlCx48VOtwDz5GHHHXbNxTMCxx@rUlc2HFtJsHV/PaXkpEvb7JBdRIl8fE@P4DrV6SZrZdNNVJ0Xh1IcehFpEcW@G7i3idcWeZ8ViI0ruYga7yFtUIlIOX0s34l5Mtbx2sRJH68dxzwlBXct5HjG3d7ilyKacn7IarXpYAECYs/zvrZtusc5T8JRWbdYFR3sqTQNKXyGOQXH4fBrBGBKdd9RkbGQ3if4boDvBvjuBAcYhHoqL6w@Ll245yAicPAehIAd5@EZUv8buX@J3BKyxJ6jPqZliduzGUFmmxtw4OYmc2HKIQKfQ3fX1ltgUum0kjm0xaavOnbOrIh565VS5d9UXuxQG56TinHvCMA/Cr4AbmOVmL9NfHqxCYNPwBzGSZMVjE5UdJAopQGmQwGs2ONokKurwqvqn0i8pPA4Gr6Q0he@p92dV1Y1jdhe21Tl9QNyGEPw4SOH9yaEx4bVtQ0L/3nSS@PvdYc/hd80s2d4cAX85In9UKn2aStWOmCvaiUufEtnp5sSheYcF8Hf3GrIXeBcoWXVAb/Ealj4S@ojVTg6utHXmdfBdfDZ/82KXDnkyTibvTWmh3GhdkHazda0TDqIZUJz0zN@kc9yma1D8mDvl4ht/wV2qgW2ZkXCwxM "JavaScript (Node.js) – Try It Online"