Упростите выражение. Даю 50 баллов.
1) (3-1,5p)²+(8-1,5p)(8+1,5p)
2) (2+0,7y)²+(4-0,7y)(4+0,7y)
3) (1,5-8a)(1,5+8a)+(7+8a)²
4) (0,6-7x)(0,6+7x)+(1+7x)²
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