Write the expression as a single logarithm with a coefficient of (1):

[log₁₀(x² - 4) - 4log₁₀(x²) + 7log₁₀(x)]

a) (log₁₀((x² - 4) - 4x² + 7x))
b) (log₁₀(x² - 4x² + 7x))
c) (log₁₀(x² - 4) - 4log₁₀(x²) - 7log₁₀(x))
d) (log₁₀(x² - 4) - log₁₀(x¹⁰) + log₁₀(x⁷))