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d)=1,5xy+1,6xy²+6y²
e)=2a²b²-a²b³-3a²b-4ab²
f)=6m²n-8m²n²+16m³n-6amn-8bmn
to f) to na pewno tak wygląda??
2x²-xy+3xy=2x²+2xy
3y(jedna druga x + osiem piętnastych xy + 2y)=
3/2xy+8xy²/5+6y²=15xy+24xy²+60y²
ab(2ab-ab do potegi 2 - 3a-4b)=
2a²b²-a³b³-3a²b-4ab²
2mn(3m-4mn+8m do potegi 2-3a-4b)=
6m²n-8m²n²+128m³n-6amn-8bmn