15. выражение 3а\а-4 - а+2\а2-8 × 96\а²+2а

3а\а-4 - а+2\а2-8 × 96\а²+2а
3a/a-4 - a+2/a²-8*96/a(a+2)
3a/a-4-1/a²-8*96/a
3a/a-4-96/a(a²-8)
3a²(a²-8)-96(a-4)/a(a-4)(a²-8)
3a^4-24a^4-96a+384/(a²-4a)(a²-8)
3a^4-24a²-96a+384/a^4-8a²-4a^3+32a
3a^4-24a²-96a+384/a^4-4a³³-8a²+32a