a) x^13/x^8x^2 = x^(13-8)x^2 = x^5*x^2 = x^7
b) n^3*n^8/n^7 = n^(3+8)/n^7 = n^11/n^7 = n^4
c) (a+b)^10/(a+b)^4(a+b) = (a+b)^(10-4)(a+b) = (a+b)^6*(a+b) = (a+b)^7
a) x^13/x^8x^2 = x^(13-8)x^2 = x^5*x^2 = x^7
b) n^3*n^8/n^7 = n^(3+8)/n^7 = n^11/n^7 = n^4
c) (a+b)^10/(a+b)^4(a+b) = (a+b)^(10-4)(a+b) = (a+b)^6*(a+b) = (a+b)^7