(f, x)
Try to integrate f dx from zero to infinity.

    This function calls _meijerint_definite_4 to try to compute the
    integral. If this fails, it tries using linearity.
Try to integrate f dx from zero to infinity.
Try to integrate f dx from zero to infinity .
def _meijerint_definite_3(f, x):
    """
    Try to integrate f dx from zero to infinity.

    This function calls _meijerint_definite_4 to try to compute the
    integral. If this fails, it tries using linearity.
    """
    res = _meijerint_definite_4(f, x)
    if res is not None 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 is not None 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