Input:
d(f(x)*g(x)*h(x))
Write:
`d(f(x)*g(x)*h(x))`
Output: $$ \frac{d}{dx} f(x)\ g(x)\ h(x) == \frac{d}{dx} h(x)\ f(x)\ g(x)+(\frac{d}{dx} g(x)\ f(x)+\frac{d}{dx} f(x)\ g(x))\ h(x) $$ Result:$$\frac{d}{dx} h(x)\ f(x)\ g(x)+(\frac{d}{dx} g(x)\ f(x)+\frac{d}{dx} f(x)\ g(x))\ h(x)$$