"combining it" is a correct and usable phrase in written English.
You can use it when joining two things together, for example, "He added blue food coloring to the batter, combining it with the red to make purple."
I've played around with combining it with pasta for years.
Harris makes his own butter, combining it with a magical local ingredient – seaweed.
Lectures on combining it all often come from the ultra-rich, such as Sheryl Sandberg.
"We're talking about combining it with a real farmer's market," Mr. Wood said.
If you're after a big trip, how about combining it with the wedding?
Sen wants to do ensemble work, but she has found ways of combining it with solos.
"Tenafly is doing very well," he said, adding that combining it would be a mistake.
The Cornish Seaweed Company suggest combining it with yoghurt to create a salad dressing or dip.
Devolving health care, and combining it with social care, will save billions.
"But from the standpoint of buying and combining, it was ideal".
He laughed as he told us that Universal tried to promote the western by combining it with his biker persona.
