7. 3y^4+2y^3+y^2-7y-4
8. x^5+9x^4-8x^3-2x^2+7x-4
9. 7a^2+5ab-2b^2
10. (m^3)n-3(m^2)(n^2)+8m(n^3)
a ^ just means "to the power of"
2^2=4
how you do this is just to arrange in order smallest to largest, alphabetical, or in a way that just makes sense
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