Найдите производную функции 1/3x^9+2/7x^49-5x+9+1/9x^81.

y=1/(3*x^9)+2/(7*x^49)-5*x+9+1/(9*x^81)=1/3*x^-9+2/7*x^-49-5x+9+1/9*x^-81
y'= 1/3*(-9)*x^-10+2/7*(-49)*x^-50-5+1/9+(-81)*x^-82= -3*x^-10-14*x^-50-5-9*x^-82