We can do this by dividing both sides by $(4x-1)^2$:
$$f(x) = \frac{(3x+1)^3}{(4x-1)^2}$$
Now, we can differentiate $f(x)$ using the Quotient Rule, which states that if $f(x) = \frac{g(x)}{h(x)}$, then $f'(x) = \frac{g'(x)h(x) - g(x)h'(x)}{[h(x)]^2}$. In our
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