SUMA Y RESTA DE POLINOMIOS

$$6x^2+10y-3b$$  

$$6x^2+9y-8b$$  

$$6x^2+9y+11y$$  

$$6x^2+9y-11b$$  

$$x^6+7x^5+5x^3+3x^2-9x$$  

$$3x^6+x^5+5x^3+3x^2+7x+20$$  

$$x^6-7x^5+5x^3+3x^2+9x$$  

$$-5x^4-6x^3-8x^2-5x-3$$  

$$-5x^4+6x^3-8x^2-5x-2$$  

$$-5x^4+6x^3+8x^2-5x+4$$  

$$3x^{a+1}-4x^{a+2}$$  

$$3x^{a+1}+8x^{a+2}$$  

$$3x^{a+1}-8x^{a+2}$$