how to simplify

Question

Simplify the following: 1. [(3.2^ x+1) – (4.2^ x-1)] / [2^ x-3] 2. (4^-2) + (5/4) ÷ (4/2) 3. [2√27−√108+√75] / [3√12 ]

Answer 1

(1). The expression is [(3.2^ x+1) – (4.2^ x-1)] / [2^ x-3].

Answer 2

(2). The expression is (4^-2) + (5/4) ÷ (4/2).

Answer 3

(3). The expression is [2√27−√108+√75] / [3√12 ].