2(м²+1+2m)+3(m²+1-2m)-5(m²-1)=4
2m²+2+4m+3m²+3-6m-5m²+4=4
2m²+3m²-5m²+4m-6m=4-2-3-4
-2m=-5
m=5/2=2.5
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2(м²+1+2m)+3(m²+1-2m)-5(m²-1)=4
2m²+2+4m+3m²+3-6m-5m²+4=4
2m²+3m²-5m²+4m-6m=4-2-3-4
-2m=-5
m=5/2=2.5