найти производную
(х-2)^2/x+1=((x-2)^2)'(x+1)-(x-2)^2(x+1)'/(x+1)^2=2(x-2)(x+1)-(x-2)^2/(x+1)^2=2(x^2+x-2x-2)-(x-2)^2/(x+1)^2=2(x^2-x-2)-(x^2-2x+4)/(x+1)^2