计算(3/5a^5b^3+9/5a^7b^4-9/2a^5b^5)\(3/4a^5b^3)

(3/5a^5b^3+9/5a^7b^4-9/2a^5b^5)/(3/4a^5b^3)
=[(3/5)·a^5b^3+(9/5)·5a^7b^4+(9/2)·a^5b^5]/[(3/4)·a^5b^3]
={(a^5b^3)·[3/5+(9/5）·a^4b-(9/2)·b^2]}/[(3/4)·a^5b^3]
=[3/5+(9/5）·a^4b-(9/2)·b^2]/(3/4)
=(4/3)·[3/5+(9/5）·a^4b-(9/2)·b^2]
=4/5+(12/5)·a^4b-6·b^2

写的明白吗？电脑书写不如笔写的明显，凑合看吧