To find the sum of the two expressions, we'll add them term by term. The given expressions are:

1. $6x^2 - 36x - 3$
2. $8x^2 - 5x - 1$

Let's add them step by step:

Step 1: Combine the $x^2$ terms

$6x^2 + 8x^2 = 14x^2$

Step 2: Combine the $x$ terms

$-36x - 5x = -41x$

Step 3: Combine the constant terms

$-3 - 1 = -4$

Final Sum

$14x^2 - 41x - 4$

So, the sum of the two expressions is $\boxed{14x^2 - 41x - 4}$.

Would you like more details or have any questions?

Here are five related questions to explore further:

1. How would you find the roots of $14x^2 - 41x - 4$?
2. Can you factorize $14x^2 - 41x - 4$ completely?
3. How would the solution change if the coefficient of $x^2$ in the second expression was negative?
4. What is the value of the expression when $x = 2$?
5. How can we graph the expression $14x^2 - 41x - 4$?

Tip: Always double-check the signs when combining like terms in polynomial expressions to avoid mistakes.