1) y'=5tg^4(3x^4-13)* 1/cos^2(3x^4-13)* 12x^3
2) y'=4ctg^3(5x^3+6)*1/-sin^2(5x^3+6)*15x^2
3)y' =4cos^3(6x^2+9)* (-sin(6x^2+9))*12s
1) y'=5tg^4(3x^4-13)* 1/cos^2(3x^4-13)* 12x^3
2) y'=4ctg^3(5x^3+6)*1/-sin^2(5x^3+6)*15x^2
3)y' =4cos^3(6x^2+9)* (-sin(6x^2+9))*12s