1.m6n9:(m4n6 x mn4)= 2.a9b8:[a3b x (-a2b4)]= 3.(x2+9x+18):(x+6)= 4.(8a2b4)3= 5.(5p4q2r3)4= 6.a/3 - a-2/5= 7.x+3/8x + 2x=

[tex]1. {mn}^{ - 1} [/tex]
[tex]2. { - a}^{4} {b}^{3} [/tex]
3. x + 3
[tex]4. {8}^{3} {a}^{6} {b}^{12} [/tex]
[tex]5. {5}^{4} {p}^{16} {q}^{8} {r}^{12} [/tex]
[tex]7. \frac{x + 3}{10x} [/tex]
[tex]6. \frac{4a - 6}{15} [/tex]

btw kalo salah maaf ya

ps : no 6 sama 7 kebalik