(a×b×c×4)7= (a\times b\times c\times4)^7= (a×b×c×4)7=
We use the formula:
(a×b)x=axbx (a\times b)^x=a^xb^x (a×b)x=axbx
Therefore, we obtain:
a7b7c747 a^7b^7c^74^7 a7b7c747
a7×b7×c7×47 a^7\times b^7\times c^7\times4^7 a7×b7×c7×47