What is the formula and solution to restore the last layer of the third-order Rubik's cube by seven-step method?

The formula and schematic diagram of restoring the last layer of the third-order Rubik's Cube by seven-step method are shown in the following figure:

Formula steps:

1. Cross color at the bottom: R 'U 'RUR' or R 'U '2RU2R' (ten at the bottom

I want to put this word back. )

Second, the homing of the bottom corner block: (R'D 'RD)* 1/3/5.

Iii. where the middle prism is located: URU 'R 'U 'F 'UF (right) or U' L' ULUFU'

F' (left)

Four. Top cross alignment: (FRUR'U 'F ')* 1/3/5

Five, the top cross color: rur' uruur' u (the two pieces with the correct color are placed at the back.

Party and rights)

Six, the top four corners return: URU 'L 'UR 'U 'L (put the correct color on the right.

The thumb of the hand)

Seven, the four corners above the color: (R'D 'RD)* 1/3/5 (always use the same face.

Do it yourself)

Third-order Rubik's cube:

The English official name of the third-order Rubik's Cube is Rubik's Cube, named after Professor Rubik, which is the most common Rubik's Cube before. It has three squares on each side. The side length of the official version of the Rubik's Cube is 57 mm, and the total number of changes of the third-order Rubik's Cube is about 230 million. The third-order Rubik's Cube consists of six central blocks, eight corner blocks and 12 side blocks connected by a central axis. When they are connected together, they will form a whole, and either side can rotate horizontally without affecting other squares.

reference data

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