Нвйти производную функции: а) f (x)= 3x^7 + x^4+ 1 б)f (x) =2cos (x- п/3)+e^x в)у=(2х+3)^4

A) f'(x)=3*7*x^6+4x^3; f'(x)=21x^6+4x^3;
b)f'(x)=2*(-sin(x-π/3)) *(x-π/3)'+e^x=-2sin(x-π/3)+e^x
c)y'=4(2x+3)^3 *(2x+3)'=8(2x+3)^3