Fourier series: odd & even extensions

I'm setting up a couple of worksheets (though ideally I'd like to have 2 in 1) that will enable me to work out Fourier series, the respective odd & even extensions and display the graphs.

Questions:

1) Is there a way to display a function g(t) in one set of curly brackets? e.g. (something looking like this but inside the culry brackets)

1 (0 < t <= 1)

g(t) = {

2 - t (1 < t <= 2)

2) Calculations are flagged in red (actually, nothing is being calculated at all!) when I try to work out the Fourier series of g(t) symbolically. I'm not sure what it is that I've missed?!?

N.B. I have used the necessary parts from a worksheet that came with my MathCad package 14.0 M020 and trying to make some sense of it.