an⋅am=an+m
43⋅46=43+6=49at⋅aq=at+qx3⋅x57=x3+57=x60
47⋅4−2=47+(−2)=45at⋅a−q=at+(−q)=at−qx3⋅x−7=x3+(−7)=x3−7=x−4