y=[(x-1)/(x+2)]^4
y`=4*[(x-1)/(x+2)]^3 *[(x-1)/(x+2)`=
=4*[(x-1)/(x+2)]^3 *[(x+2)-(x-1)]/(x+2)^2=
=12(x-1)^3/(x+2)^5
y'=4[(x-1)/(x+2)]^3*[(x+2-x+1)/((x+2)^2]=4[(x-1)/(x+2)]^3*(3/((x+2)^2)=(12(x-1)^3)/((x+2)^5)
y=[(x-1)/(x+2)]^4
y`=4*[(x-1)/(x+2)]^3 *[(x-1)/(x+2)`=
=4*[(x-1)/(x+2)]^3 *[(x+2)-(x-1)]/(x+2)^2=
=12(x-1)^3/(x+2)^5
y=[(x-1)/(x+2)]^4
y'=4[(x-1)/(x+2)]^3*[(x+2-x+1)/((x+2)^2]=4[(x-1)/(x+2)]^3*(3/((x+2)^2)=(12(x-1)^3)/((x+2)^5)