def _meijerint_definite_3(f, x):
 res = _meijerint_definite_4(f, x)
 if (res and (res[1] != False)):
  return res
 if f.is_Add:
  _debug('Expanding and evaluating all terms.')
  ress = [_meijerint_definite_4(g, x) for g in f.args]
  if all(((r is not None) for r in ress)):
   conds = []
   res = S(0)
   for (r, c) in ress:
    res += r
    conds += [c]
   c = And(*conds)
   if (c != False):
    return (res, c)

def _meijerint_definite_3 ( f , x ) : res = _meijerint_definite_4 ( f , x ) if ( res and ( res [ 1 ] != False ) ) : return res if f . is_Add : _debug ( 'Expanding and evaluating all terms.' ) ress = [ _meijerint_definite_4 ( g , x ) for g in f . args ] if all ( ( ( r is not None ) for r in ress ) ) : conds = [ ] res = S ( 0 ) for ( r , c ) in ress : res += r conds += [ c ] c = And ( * conds ) if ( c != False ) : return ( res , c )
try to integrate f dx from zero to infinity .