multiline functions that I can then plot

I've written a multiline function using LaTex, but then I can't seem to work out how to plot it.

f(x) = \begin{cases} \frac{12}{7}(1+x)^2 & \quad \text{for} \; -1< x \leq 0\\ \frac{12}{7}(1-x)^3 & \quad \text{for} \; 0< x < 1\\ 0 & \quad \text{otherwise} \end{cases}

I don't know where to go from here!
Any help is greatly appreciated.
Thank you