(-3a²)三次方·a三次方+(-4a)²a七次方-(5a三次方)三次方

(-3a²)三次方·a三次方+(-4a)²a七次方-(5a三次方)三次方
(-3a²)三次方·a三次方+(-4a)²a七次方-(5a三次方)三次方

(-3a²)三次方·a三次方+(-4a)²a七次方-(5a三次方)三次方
(-3a²)^3·a^3+(-4a)²*a^7-(5a^3)^3
=-27a^6*a^3+16a^*a^7-125a^9
=-27a^9+16a^9-125a^9
=-136a^9.

（-3a²）³·a³+（-4a）²a7次方-（5a³）³
=-27a6次方·a³+16a²·a7次方-25a9次方
=-27a9次方+16a9次方-25a9次方
=-36a9次方