tarinmaxine tarinmaxine 19-08-2019 Mathematics contestada 10. 4xy – 6xy + 5y - 9x 12. -5f-7g + f-5g - 4 +f 14. 6n2 - 2n - 3 + 5n2 - 9n - 6 16. -12x²y – 3x²y 18. 19x²y – 4xy² + 5xy² – 16x²y