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)
!!!!!!!!!!!!!!!!!!!!!!