It is the number (WITH its sign) that comes before the x3 and so it is -2.
5x5 - x - 5
No, not really - at least not for me (I'm 52yo) I think that the differences between the 4x4 and 5x5 are slight. It's one of those things where "if you can solve a 3x3 you can solve a 4x4 and if you can solve a 3x3 and a 4x4 you can solve a 5x5. The hardest part comes with the edges - there's some weird manuevers you have to do to get the edges right and oddly enough the 5x5 is easier on the edges than the 4x4 because the 5x5 has a center edge for each color and that makes it easier to get matches. It did for me anyway. But once I learned the 4x4, the 5x5 wasn't too hard to pick up.
The fastest 5x5 solve in official WCA competitions is 44.74 seconds, set by Max Park from the USA in 2021.
2x2x2 = 8 and 5x5 = 25 8+25 = 33
-6x3 + 4x7 - 0.8x2 + x4 - 5x5 = 4x7 - 5x5 + x4 - 6x3 - 0.8x2 = x2 (4x5 - 5x3 + x2 - 6x - 0.8)
29
This skills that someone has to solve a Rubik's cube can be used on any size Rubik's cube, whether it be a 2x2 or a 5x5.
175
70
5x(x^4+7x+4)
first you need to be able to solve a 3x3, 4x4, and 5x5 then solve the centers and pair them up like you do to a 5x5 then pair up the edges and after that you can solve it like a 3x3 thinking that all of the centers act as one and the paired edges act as one(just turn the most outer layer) after that you may encounter parity(either the edges or the end were one pair of edges or all four are flipped) you can also go to " youtube.com " and search-how to solve a 6x6 Rubik's cube they don't have edge parity but if you can understand that then it will help!!! hope that helps!