how to create multiple formula in one colum matrix

[aniatunlinafiah]

Hi, I'm new using Power BI, and I'm very confused to create column Matrix like this, 

so the value in column 32 is a (from colum 31)-b(from colum 31)+c(from column 31), column 33 is a (from the results of calculation 32)-b+c.
Please help, how do I create this visualization?
Thank You

[lbendlin]

how is 32/b computed?