Найдите производную функции: у=(3х^3/4 - х) (2х^7 - 2х^5)

У' =((3х^(3/4)-х)*(2х^7-2х^5))'
=(3х^(3/4)-х)'(2х^7-2х^5)+(3*x^(3/4)-x)(2х^7-2х^5)' =
= (3*(3/4)х^(3/4-1) - 1)(2х^7 - 2х^5) +(3х^(3/4) - х)(2*7х^(7-1) - 2*5х^(5-1)) =((9/4)х^(-1/4) - 1)(2х^7 - 2х^5) + (3х^(3/4) - х)(14х^6 - 10х^4) =((9/2)х^(3/4) - 2x)(х^6 - х^4) + (3х^(3/4) - х)(14х^6 - 10х^4) =
= (9/2)х^((3/4)+6) - (9/2)х^((3/4)+4)  - 2x^7 +2х^5  +  42х^((3/4)+6) -30х^((3/4)+4) - 14х^7 +10х^5=
= (9/2)х^(27/4) - (9/2)х^(19/4)  - 16x^7 +12х^5  +  42х^(27/4) -30х^(19/4)=(93/2)х^(27/4) - (69/2)х^(19/4)  - 16x^7 +12х^5