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=4-(-1)*3+7/(-2,8)=4-(-3)+7/(-2,8)=7+7/(-2,8)=7-2,5=4,5
oblicz-1 1/5+(-4,2)*(- 1/7)=
=-1 1/5+(-21/5)*(-1/7)=-1 1/5+3/5=-3/5
zakładam, że w liczniku jest: -2²-(-1 )³*3+7
a mianowniku: (-2,8)
-1 1/5+(-4,2)*(- 1/7) =-1 1/5+42/10*1/7=-1,2+0,6=-0,6
Jak coś to pisz na pw. :)