2a*a+3a+2/a+1-a*a-a-5/a+2-3a*a-4a-5/a-2+2a*a-8a+5/a-3
问题描述：
2a*a+3a+2/a+1-a*a-a-5/a+2-3a*a-4a-5/a-2+2a*a-8a+5/a-3
答
a*(2a+3+2/a^2+1/a-a-1-5/a^2+2/a-3a-4-5/a^2-2/a+2a-8+5/a^2-3/a)
=-2a^2-10a-3/a-2