Simplify: fracxn−ynx−y\\frac{x^n - y^n}{x-y}fracxn−ynx−y
xn−1+xn−2y+dots+yn−1x^{n-1} + x^{n-2}y + \\dots + y^{n-1}xn−1+xn−2y+dots+yn−1
xn−1−yn−1x^{n-1} - y^{n-1}xn−1−yn−1
(x−y)n−1(x-y)^{n-1}(x−y)n−1
nxn−1nx^{n-1}nxn−1