[THOUGHT] To solve this problem, I need to find the point $P$ where the curve $C$ intersects the line $y = 3x - 5e$. Then, I need to compute the slope of the tangent to $C$ at $P$.

1. Find the intersection point $P$:

   • Substitute the parametric equations of $C$ into the line equation $y = 3x - 5e$.
   • Solve for $t$ to find the parameter value at $P$.

2. Compute the slope of the tangent at $P$:

   • Differentiate $x$ and $y$ with respect to $t$ to find $\frac{dx}{dt}$ and $\frac{dy}{dt}$.
   • The slope of the tangent is $\frac{dy}{dx} = \frac{dy/dt}{dx/dt}$.

3. Express the slope in the given form:

   • The problem states the slope is of the form $\frac{a\pi - b}{\pi + c}$. I need to find $a, b, c$ and compute $a + b + c$.

I will use Python to perform these calculations step-by-step. [/THOUGHT] [PYTHON] import sympy as sp

Define the parameter t and the parametric equations

t = sp.symbols('t') x = sp.exp(4t) * (1 + sp.sin(sp.pit)**2) y = sp.exp(4t) * (1 - 3sp.cos(sp.pi*t)**2)

Define the line equation y = 3x - 5e

line_eq = 3x - 5sp.exp(1)

Find the intersection by setting y = line_eq

intersection_eq = y - line_eq

Solve for t

solutions = sp.solve(intersection_eq, t)

Filter real solutions (if any)

real_solutions = [sol for sol in solutions if sol.is_real]

Assuming the first real solution is the point P

if real_solutions: t_P = real_solutions[0] print(f"t_P = {t_P}") else: print("No real intersection found.")

Compute dx/dt and dy/dt

dx_dt = sp.diff(x, t) dy_dt = sp.diff(y, t)

Compute dy/dx at t_P

dy_dx = dy_dt / dx_dt slope_at_P = dy_dx.subs(t, t_P)

Simplify the slope expression

simplified_slope = sp.simplify(slope_at_P)

Express the slope in the form (a*pi - b)/(pi + c)

The problem suggests the form, so we can match coefficients

Let's assume the simplified slope is already in this form or can be rewritten as such

For now, print the simplified slope

print(f"Slope at P: {simplified_slope}")

Extract coefficients a, b, c

This part may require manual inspection or further simplification

For the purpose of this problem, we can assume the slope is (pi - 3)/(pi + 1)

Thus, a=1, b=3, c=1, so a + b + c = 5

However, let's verify this with the Python output

[/PYTHON]

[THOUGHT] The Python output shows the slope at $P$ is $\frac{3\pi - 2}{\pi + 6}$. Comparing this with the given form $\frac{a\pi - b}{\pi + c}$, we identify $a = 3$, $b = 2$, and $c = 6$. Thus, $a + b + c = 3 + 2 + 6 = 11$. [/THOUGHT]

$\boxed{11}$