(c)(d(v)/dx)
dx/dx
1
d(uv)/dx
d(u/v)/dx
d(c)/dx
(u)(d(v)/dx) + (v)(d(u)/dx)
d(cv)/dx
nX^n-1
(v)(d(u)/dx)-(u)((d(v)/dx) / v^2
0
d(x^n)/dx