Let r = ln x, s = In (x² + 1), t = In (x² + 5), u = In 1, v = In 5. Rewrite the expression below in a form with no logarithm of a product, quotient or power. Then use some, or all, of the letters r, s, t, u, v, and x to enter this new form of the logarithm in the answer bl In ебх x(x² + 1)(x+5)