-9·(-133)+133·(-9) = -9·(-133+133) = -9·0 = 0
5·(-44+6)+44·5 = 5·(-44+6+44) = 5·6 = 30
56·4-4·46 = 4·(56-46) = 4·10 = 40
-9·(-133)+133·(-9) = -9·(-133+133) = -9·0 = 0
5·(-44+6)+44·5 = 5·(-44+6+44) = 5·6 = 30
56·4-4·46 = 4·(56-46) = 4·10 = 40