(a^3+1/5a^b+3)-1/2(a^2b-6)

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(a^3+1/5a^b+3)-1/2(a^2b-6)(a^3+1/5a^b+3)-1/2(a^2b-6)(a^3+1/5a^b+3)-1/2(a^2b-6)(a^3+1/5a^b+3)-1/2(a^2

(a^3+1/5a^b+3)-1/2(a^2b-6)
(a^3+1/5a^b+3)-1/2(a^2b-6)

(a^3+1/5a^b+3)-1/2(a^2b-6)
(a^3+1/5a^b+3)-1/2(a^2b-6)
=a³+1/5a²b+3-1/2a²b+3
=a³-3/10a²b+6