1) 0,7t(5u+2v+7p)
2) 21*(-2)+7*2+42= -42+14+42= 14
3)
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1) 0,7t(5u+2v+7p)
2) 21*(-2)+7*2+42= -42+14+42= 14
3)![x^3y^3(0,5x^2-y^3) x^3y^3(0,5x^2-y^3)](https://tex.z-dn.net/?f=x%5E3y%5E3%280%2C5x%5E2-y%5E3%29)
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