Multiply: fracx2−1x2+2x+1cdotfracx+1x−1\\frac{x^2 - 1}{x^2 + 2x + 1} \\cdot \\frac{x + 1}{x - 1}fracx2−1x2+2x+1cdotfracx+1x−1 (assume xneqpm1x \\neq \\pm 1xneqpm1).
111
x+1x + 1x+1
fracx−1x+1\\frac{x-1}{x+1}fracx−1x+1
x−1x-1x−1