Final answer:
To compute the expression, evaluate the functions f and g at the given points, multiply by the constants -1 and -4 respectively, and combine the results.
Step-by-step explanation:
The student has presented an expression that requires the evaluation of two functions, f and g, at specific points, followed by multiplication with given constants and summing or subtracting the results. Without the specific functions provided, we cannot compute an exact numerical answer. However, the general approach to solve an expression like -1•f(-8)-4•g(4) is to first evaluate the function f at -8 and the function g at 4. After obtaining these values, you multiply the result of f(-8) by -1, and g(4) by -4. Finally, you subtract the latter from the former to find the value of the entire expression.