tensor([[ 0.3743],
              [-1.7724],
              [-0.5811],
              [-0.8017]])
      >>> torch.add(b, c, alpha=10)
      tensor([[  2.7695,   3.3930,   4.3672,   4.1450],
              [-18.6971, -18.0736, -17.0994, -17.3216],
              [ -6.7845,  -6.1610,  -5.1868,  -5.4090],
              [ -8.9902,  -8.3667,  -7.3925,  -7.6147]])