Match each excersice with the first step needed to perform the operation 1. (3/4)-(y/4) 2. (2/a)*(3/(a+6)) 3. X+1/x divided by x-1/x 4. (9/x-2)-(x/x+2) a. Multiply by the first rational expression by the reciprocal of the second rational expression b. Find the LCD. Write each expression as an equivalent expression with the LCD as the denominator. c. Multiply numerators and multiply denominators d. Subtract numerators. Place the difference over a common denominator