Спростити вираз
2a(3b-a)=
4m(2p+m)=
(x-2y)^2=
(m-2t) (m+2t)-m^2=
(x+4y:x^2-4xy-x-4y:x^2+4xy):(4y^2:16^2-x^2)=
b-4:bc-b^2-4-c:bc-c^2=

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