Find the indicated derivative.
$\frac{d}{dt}(-5x)$

Let f(x) = x³ − 3x² − 1, x ≥ 2. Find the value of df⁻¹/dx at the point x = −1 = f(3).

In Exercises 59–86, find the derivative of y with respect to the given independent variable.

85. y = log₂(8t^(ln 2))

Find the indicated derivative.

$f(x)=3x-4$

$f^{\(\prime\)}(x)=$

Find the indicated derivative.

$\frac{d}{dt}(-5t)$

Find the indicated derivative.

$\frac{d}{dx}\left(\pi \right)$

Find the indicated derivative.

$f(x)=6x^4-4^3$

$f^{\(\prime\)}\(\left\)(x\(\right\))=$

Find the indicated derivative.

$d/dt(5-7t^{-3})$

Find the indicated derivative.

$y=\frac{5}{2}{x}^5+2x^3+6x-\frac{\surd 3}{4}$

$y^{\prime }=$