Answer:
1. -144d-80
2. -265+140d
3. -105x-45
1. 8(-18d-10) = -144d-80
2. -13+14(-18+10d) = -13-252+140d = -265+140d
3. 15(-7x-3) = -105x-45
The number are quite weird but we have to deal with them.
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