Найти производную y. 1)y=6x^3+x^2+x 2)y=5x^3-2x 3)y=1/3x^3-3x^2+x 4)y=-x^3+1/2x^2-8x+13 5)y=x^5-x^4-x 6)y=7x^7+6x 7)y=x^2+1/x^1 8)y=x^3+1/x^2 решите !

1) y' = 18x^2 + 2x +1
2) y' = 15x^2 - 2
3) y' = x^2 - 6x + 1
4) y' = -3x^2 + x - 8 
5) y' = 5x^4 - 4x^3 - 1
6) y' = 49x^6 + 6
7) y' = 2x + 2/x^2
8) y' = 3x^2 + 3/x^3