Question $7$ A complete list of the regular singular points for the differential funstion $x(x1){?}^2(x2{)}^2(x-2{)}^4{y}^{\text{'}\text{'}}-(x-1)(x-2{)}^3{y}^{\text{'}}x(x-2)y=0$ is siven by:

$-1,0,11,-20,10,20,1,2$