Your goal:
To complete this layer, you need to use two formulas, first find the target edge block according to the color, then put the target edge block to the upper right(UR) position, and then move the target edge block according to the following 2 cases.
You may encounter the situation where the target edge is already in the middle layer. You has no way to turn it to the UR position. You can use any of the formulas described above to push the edge block to the up layer and then it become one of the case1-2.
So far, you have learned 5 of the 9 formulas, and you can restore the Rubik’s cube by learning 4 formulas. :)
5/9