у' =(sin(arctg^4(4x^3)))' = cos(arctg^4(4x^3))*(arctg^4(4x^3))' =
= cos(arctg^4(4x^3))*(4arctg^3(4x^3))*(arctg(4x^3))' =
= cos(arctg^4(4x^3))*(4arctg^3(4x^3))*(1/(1+(4x^3)^2)* (4x^3)' =
= cos(arctg^4(4x^3))*(4arctg^3(4x^3))*(1/(1+(4x^6))* 12x^2
y' = (tg(arccos^3(3x^2)))' = 1/cos^2(arccos^3(3x^2))*(arccos^3(3x^2))' =
= 1/cos^2(arccos^3(3x^2))*3arccos^2(3x^2)*(arccos(3x^2)' =
= 1/cos^2(arccos^3(3x^2))*3arccos^2(3x^2)*(-1/корень(1-(3x^2)^2))*(3x^2)' =
= 1/cos^2(arccos^3(3x^2))*3arccos^2(3x^2)*(-1/корень(1-(3x^4))*6x