{{getNum(x,y)}}
{{getNum(10000+1*x,y)}}	{{getNum(20000+1*x,y)}} {{getNum(30000+1*x,y)}} {{getNum(40000+1*x,y)}}
{{getNum(50000+1*x,y)}}

Scramble   X X' Y Y' Z Z'   Show colors

U L F R B D

U' L' F' R' B' D'  

Uw Lw Fw Rw Bw Dw

Uw' Lw' Fw' Rw' Bw' Dw'  

3Uw 3Lw 3Fw 3Rw 3Bw 3Dw

3Uw' 3Lw' 3Fw' 3Rw' 3Bw' 3Dw'  

4Uw 4Lw 4Fw 4Rw 4Bw 4Dw

4Uw' 4Lw' 4Fw' 4Rw' 4Bw' 4Dw'  

You can turn one center by a certain amount, and another center by the opposite amount, using a commutator like
(M' U M) E (M' U' M) E'. (This commutator will twist the F center clockwise, and the L center counterclockwise.)
Second, you can turn the U center by 180 degrees using either (L R U2 L' R' U)2 or (R' U' R U')5. Note that it is actually impossible to turn one center by only 90 degrees.