Calculus Help: Find the limits lim (x→64)⁡ (√x-8)/(∛x-4) - lim(x→6)⁡ (2-√(x-2))/(x^2-36)

Here is the technique to solve 3 limits and how to solve them in here:
lim┬(x→64)⁡〖(√x-8)/(∛x-4)〗
lim┬(x→6)⁡〖(2-√(x-2))/(x^2-36)〗
lim┬(x→9)⁡〖(2x^5-162x^3)/(x^5-6x^4-27x^3 )〗

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