Some sample code
From OpenWetWare
[math]\displaystyle{ f(x) = y + z }[/math]
[math]\displaystyle{ g(x) = \frac {z^{2 x}}{t + b_{j , i}} }[/math]
[math]\displaystyle{ f(x) = y + z }[/math]
[math]\displaystyle{ g(x) = \frac {z^{2 x}}{t + b_{j , i}} }[/math]