subtract the sum of 4p+6q and 8p-12q from the sum of 13p-6q and 15p+8q
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28p+2q-(12p-6q)
28p+2q-12p+6q
16p+8q
28p+2q-12p+6q
16p+8q
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0
Answer:
388384488_&9474448844848448448
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