(command.Pipeline
  children: [
    (C {(tr)} {(-cd)} {(SQ <'[.\\n0-9]'>)})
    (C {(sed)} {(SQ <'/^$/d'>)})
    (C {(paste)} {(-s)} {(-d) (Lit_Other '+')})
    (C {(bc)})
  ]
  negated: F
)