Question 184069
Quicknote:
a<sup>3</sup>-b<sup>3</sup>=(a-b)(a<sup>2</sup>+ab+b<sup>2</sup>)

Observation: 1000P<sup>3</sup>=(10P)<sup>3</sup> and 27J<sup>3</sup>=(3J)<sup>3</sup>

So
let a=10P
    b=3J

1000P<sup>3</sup>-27J<sup>3</sup>=(10P-3J)(100P<sup>2</sup>+30PJ+9J<sup>2</sup>)

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