f =u/v
f = ln u
f = u + v
f =1/v
f = e^u
f = v ° u
f = uv
f (x) = u(ax + b)
f ' =u'/u
f ' = u' ×(v' °u)
f ' (x) = au' (ax + b)
f ' = u' v + v' u
f '= – v '/v^2
f ' = u' ×e^u
f ' =(u' v – v ' u)/v^2
f ' = u' + v'
