[tex]lim_{x \to 2}\frac{\sqrt[3]{6f(x)+5}-5}{x^2+x-6}=lim_{x \to 2}\frac{\frac{6f(x)+5-125}{(\sqrt[3]{6f(x)+5})^2+5\sqrt[3]{6f(x)+5}+25}}{(x+3)(x-2)}=lim_{x \to 2}\frac{6(f(x)-20)}{(x+3)(x-2)((\sqrt[3]{6f(x)+5})^2+5\sqrt[3]{6f(x)+5}+25)}=lim_{x \to 2}\frac{f(x)-20}{x-2}.\frac{6}{(x+3)(\sqrt[3]{6f(x)+5})^2+5\sqrt[3]{6f(x)+5}+25)}=10.\frac{6}{5.75}=\frac{4}{25}[/tex]