Hello, I would ask you how to write integrate formula.

I know this will work..

```
F(x)<-integrant (exp (x)/x^2)
integrate(f(x), lower = 0, upper = Inf)
```

but what i want to is put `9x^3`

before `integrant`

.

the formula is technically

`F(x)<-9x^3*integrant (exp (x)/x^2)`

but this doesn't work.

also `f(x)*9x^3`

i appreciate your advice. im not good at math.

thank you.

Elly