You can put this solution on YOUR website! Two problems:
What is the question?
1/c(-1) is not a question nor even a problem. It is an expression.
Only equations have answers and solutions. Otherwise you have to ask a specific questions such as reduce or write in simplest terms.
You need to learn to write math correctly.
Do you mean 1/c^(-1)
c^(-1) means 1/c^1
1/c^1 means 1/c
so 1/c(-1) means 1/(1/c) which is c