(1/2a^3b-a^2+2/3b^2)-2(1/8a^2+1/3a^3b-1/5b^2）计算

(1/2a^3b-a^2+2/3b^2)-2(1/8a^2+1/3a^3b-1/5b^2）计算
(1/2a^3b-a^2+2/3b^2)-2(1/8a^2+1/3a^3b-1/5b^2）计算

(1/2a^3b-a^2+2/3b^2)-2(1/8a^2+1/3a^3b-1/5b^2）计算
原式=1/2a^3b-a^2+2/3b^2-1/4a^2-2/3a^3b+2/5b^2
=-1/6a^3b-5/4a^2+16/15b^2

(1/2a³b-a²+2/3b²)-2(1/8a²+1/3a³b-1/5b²）
=1/2a³b-a²+2/3b²-1/4a²-2/3a³b+2/5b²
=1/6a³b-5/3a²+16/15b²