For the following exercises,

a$.$ evaluate $f^{\text{'}}(a),$ and

b$.$ graph the function $f(x)$ and the tangent line at $x=a.$

$27.$ I$]f(x)=2x^3+3x-x^2,a=2$

$128.[$T$]f(x)=\frac{1}{x}-x^2,a=1$

$129.[$T$]f(x)=x^2-x^{12}+3x+2,a=0$

$130.[$T$]f(x)=\frac{1}{x}-x^{\frac{2}{3}},a=-1$

$131.$ Find the equation of the tangent line to the graph of $f(x)=2x^3+4x^2-5x-3$ at $x=-1$