Math !
1. simplify -14x^3/x^3-5x^4
2. simplify x+7/x^2+4x-21
3. simplify x^2-3x-18/x+3
4. simplify 3/5a multiply by 1/a^2
5. simplify x+2/5x-15 multiply by (10x^2-25x-15)
6. divide (x^2-16/x-1) /x+4
7. divide (x^2+2x+1/x-2)/(x^2-1/x^2-4)
8. divide (24w^10+8w^12)/(5w^5)
9. divide (-5w^10+10w^8+5w^6)/(5w^5)
10. simplify into one fraction (-4x/x+//x+7)