(log6^4)(log6^18)+2(log6^3)^2

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(log6^4)(log6^18)+2(log6^3)^2(log6^4)(log6^18)+2(log6^3)^2(log6^4)(log6^18)+2(log6^3)^2(log6^4)(log6

(log6^4)(log6^18)+2(log6^3)^2
(log6^4)(log6^18)+2(log6^3)^2

(log6^4)(log6^18)+2(log6^3)^2
(log6^4)(log6^18)+2(log6^3)^2
=(log6^4)(log6^6+log6^3)+2(log6^3)^2
=log6^4*log6^6+log6^4*log6^3+2(log6^3)^2
=log6^4+log6^4*log6^3+2log6^3*log6^3
=log6^4+log6^4*log6^3+log6^9*log6^3
=log6^4+(log6^4+log6^9)*log6^3
=log6^4+(log6^36)*log6^3
=log6^4+2*log6^3
=log6^4+log6^9
=log6^36
=2

90(log 6)^2