Раскройте скобки и упростите выражения:
1)-(y-7,4+x)-(11,6-y);
2)(-2,6+x+y)-(x-y-2,6).
1)-(y-7,4+x)-(11,6-y);
2)(-2,6+x+y)-(x-y-2,6).
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-(y-7,4+x)-(11,6-y)=-y+7,4-x-11,4+y=-4-x(-2,6+x+y)(x-y-2,6)=-2,6+x+y-x+y+2,6=2y