Set up the composite result function.
Evaluate by substituting in the value of into .
Simplify the denominator.
Subtract from .
Add and .
Multiply the numerator by the reciprocal of the denominator.
Cancel the common factor of .
Cancel the common factor.
Rewrite the expression.
Find f(g(x)) f(x)=2/(x-7) , g(x)=2/x+7