import numpy as np

a = np.array([[1], [2]])
b = np.array([[0, 1, -1]])
A = np.array([[0, 1], [-1, 1]])
B = np.array([[2, 0, 1], [1, -1, 0]])

calculations = [
    lambda: np.dot(A, a),
    lambda: np.dot(a, B),
    lambda: np.dot(a.T, B),
    lambda: np.dot(B, b.T),
    lambda: np.dot(A, B),
    lambda: np.dot(np.dot(a.T, B), A),
    lambda: np.dot(np.dot(a.T, B).T, A),
    lambda: np.dot(B, A),
    lambda: np.dot(B.T, A),
]

for calc in calculations:
    try:
        print(calc())
        print("\n")
    except Exception as e:
        print(e)
        print("\n")