Order of operations rules (PEMDAS) require that we perform multiplication first in this expression, 11(3p+5x)4x-x. Working from left to right, we obtain first:
(33p + 55x)(4x) - x. Here we have another, similar, multiplication to do, and the result is:
132px + 220x^2 - x
This in itself is a satisfactory answer. You could, if you wished to do so, factor out x to the first power:
x(132p + 220x - 1).