35.15. 1) (522 - 6k)2 – (522 + 3k)2 + 90zPk = 27k+;

2) (mº-n) (m+ n) - m (m? - n") - mn? = -n";

3) (1,2x4 - 7y) (1,2x + 7y) + 0,56x8 + 49y' = 2x8;

4)(1,4a3 - 56) (1,4a + 5bº) -2,96a6 + 2564 = -a.​

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