=2а^2b^3*8a^2b^4*5a^3=80a^7b^7
=7^4*7^3*8^3/8^2*7^7=7^7*8^3/8^2*7^7=8
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=2а^2b^3*8a^2b^4*5a^3=80a^7b^7
=7^4*7^3*8^3/8^2*7^7=7^7*8^3/8^2*7^7=8