HELP PLEASE ASAP 35 POINTS 1.Perform the addition of polynomials: 2/3 m+ 3/5 n−r, − 1/3 m− 7/10 n+ 1/2 r, and − 1/3 m− 7/10 n+ 1/2 2.Subtract: 2x^2−3xy+4y^2 from 3x^2−5xy−6y^2 3. Sub

HELP PLEASE ASAP 35 POINTS

1.Perform the addition of polynomials:

2/3 m+ 3/5 n−r, − 1/3 m− 7/10 n+ 1/2 r, and − 1/3 m− 7/10 n+ 1/2

2.Subtract:

2x^2−3xy+4y^2 from 3x^2−5xy−6y^2

3. Subtract:

4x^3−6x^3+8x−9 from 7x^3−16x+18

4.From the sum of 3a^2−ab−2b^2 and 2a^2+5ab−3b^2subtract a^2−3ab−4b^2

5.From 6x^2-7xy+8y^2 subtract the sum of x^2−3xy−y^2and 2x^2+5xy−4y^2

6.Find the difference between the polynomials:

6a^3+2a^2-8a–9 and 8a^3–a^2–6a+1