Just found this though

]]>And where can I look up commands for this code?

]]>`[math]\sum_{k=1}^\infty2^{k+1}-2^{k-1}[/math]`

K = 1:

2^2 - 2^0 = 4 - 1 = 3

K = 2:

2^3 - 2^1 = 8 - 2 = 6

K = 3:

2^4 - 2^2 = 16 - 4 = 12

K = 4:

2^5 - 2^3 = 32 - 8 = 24

And so on.

]]>Summation of k = 1 to n of 2^(k+1) - 2^(k-1)

]]>Σ (Equation)

k = 1 <- starting]]>