a) 11'=0
b) (6x+8)'=6x'+8'=6
c) (x-5)'=x'-5'=1
d) (8-x/3)'=8'-(x/3)'=-(3(x)'-(3)'x/9)=-(3/9)=-(1/3)
e) (x^5)'=5x^4
f) (8x^6)=(8)'x^6+8(x^6)'=48x^5
g) (1/x^7)'=((1)'x^7-(x^7)')/(x^7)^2=-(7x^6/x^14)
i) (6/x^4)'=((6)'x^4-6(x^4)')/(x^4)^2=-(24x^3/x^8)
j) (7x-x^4)'=(7x)'-(x^4)'=7-4x^3