Answer:
<em>There is not enough information to evaluate this expression any further. </em>
f=-6 is an expression so it is left how it is.
Step-by-step explanation:
f= -6 does not have any of the following, +, -, *, /, or a variable after the = sign.
Try re-stating the problem again, or take the answer I have provided.
<u><em>PLEASE MARK BRAINLIEST.</em></u>