Poly1305.poly: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/spec/crypto/poly1305.bend as Poly1305
Lines 139-142 of bend-collections@1.0.0.0/spec/crypto/poly1305.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/spec/crypto/poly1305.bend&start_line=139&end_line=142

import Base

def poly(+bs: List<&2, List<&2, U32>>, +r: Nat) -> Nat:
  match bs:
    case Nil{}: 0n
    case b <> rest: Nat.add(Nat.mul(coeff(b), Nat.pow(r, 1n+List.length(&2, List<&2, U32>, rest))), poly(rest, r))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.pow
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/spec/crypto/poly1305.bend&name=coeff