сократите дробь a) (21а^3-6а^2b)/(12ab-42a^2)

б)(6m^3+3mn^2)/(2m^3n+mn^3)

в) (x^2-2mx+3x-6m)/(x^2+2mx+3x+6m)

г) (8ab+2a-20b-5)/(4ab-8b^2+a-2b)

д) (16a^2-8ab+b^2)/(16a^2-b^2)

е)(9x^2-25y^2)/(9x^2+30xy+25y^2)

ж)(a^2-3a)/(a^2+3a-18)

з)(4x^2-8x+3)/(4x^2-1) и)(m^2+4m-5)/(m^2+7m+10)

записывать как дробь,без скобок...решите плиииззз...очень надо!

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