Question

I) -7s (S-4t-3u)


ii) -4c (2c-5d)
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Answer 1

I) -7
`s^2` + 28
`st` +21
`su`

II) -8
`c^2` + 20
`cd`

Explanation:

Answer 2

I) -7s^2+28st+21su
II) -8c^2+20cd