Multiply: fracx2−1x+3cdotfracx+3x−1\\frac{x^2 - 1}{x + 3} \\cdot \\frac{x + 3}{x - 1}fracx2−1x+3cdotfracx+3x−1 (assume xneq1,−3x \\neq 1, -3xneq1,−3).
x+1x + 1x+1
x−1x - 1x−1
x2−1x^2 - 1x2−1
111