Just in case a picture helps...

As usual, straight continuous lines differentiate downwards with respect to x, and the straight dashed line with respect to the dashed balloon expression. So what you have here is two of the chain rule...

...wrapped inside the product rule...

... in this case the right-hand of the two.

Try to fill in the blanks, then simplify the bottom row.

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Don't integrate - balloontegrate!

Balloon Calculus: worked examples from past papers