In integration by the rule h(x)integration s(x)-integration[h(x)int. s(x) how we integrate that part which is after the negative sign, as it is again integration of two multiplied functions . please show with an example

The method of integration which you mentioned is "integration by parts". The second term is evaluated by first finding the integration of s(x). Suppose that function is p(x). Then the second term will reduce to integral of h(x) . f(x), which is nothing but the product of two function which you can integrate.