Solve for x. 4x - 4 < 8 and 9x + 5 > 23

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Having a hard time understanding this question (see attachment).