1 answer
(click or scroll down)
It looks like you changed 11xy to
1/(11xy) and kept the exponents the same. That is not correct.
I do not undertand your ¯^5/^7 notation. Is ¯ supposed to be a minus sign? Why not use - ? Why to you have ^ in front of both 5 and 7? What is being raised to the seventh power?