Find the derivative of the function. \[ y=\frac{7}{x^{4}}-\frac{2}{x} \]

\( L ^ { - 1 } ( \operatorname { Ln } ( \frac { s ^ { 2 } + 2 s + 3 } { s ^ { 2 } + 1 } ) ) \)

\( L ^ { - 1 } ( \operatorname { Ln } ( \frac { s ^ { 2 } + 2 s + 3 } { s ^ { 2 } + 4 } ) ) \)

A car's velocity is given by the function \( v(t) = 5t^2 + 3 \). Calculate the distance traveled by the car from time \( t = 0 \) to \( t = 4 \).

12. Si una bola de nieve se derrite de tal modo que el área superficial disminuye a razón de \( 1 \mathrm{~cm}^{2} / \mathrm{min} \), calcule la rapidez con la que disminuye el diámetro cuando éste es 10 cm .

\[ f(x)=\frac{x^{2}+3 x+2}{x^{2}-2 x-3} \] a) Find the domain of \( f \) and deduce the vertical asymptote. b) Find \( x \)-axis intercepts, the \( y \)-axis intercepts and the horizontal asymptote ( check the intersection with the horizontal asymptote). c) Compute the derivative \( f^{\prime} \) of \( f \) and analyze it d) Compute the second derivative \( f^{\prime \prime} \) of \( f \) and analyze it. e) sketch the graph of \( f \)