Multiply or divide, as indicated. ac + ad + bc + bd/a² - b² * a³ - b³/2a² + 2ab + 2b²

Add or subtract, as indicated. 5/x + 2 + 2/x² - 2x + 4 - 60/x³ + 8

Add or subtract, as indicated. 4/x + 1 + 1/x² - x + 1 - 12/x³ + 1

Simplify each complex fraction. [1 + (1/x)] / (1-1/x)

Simplify each complex fraction. [ 1/(x+1) - 1/x ] / (1/x)

Simplify each complex fraction. [ 1/(y+3) - 1/y ] / (1/y)

Simplify each complex fraction. [ 2 + 2/(1+x) ] / [ 2 - 2/(1-x) ]

Simplify each complex fraction. [ 1/(a³+b³) ] / [ 1/(a² + 2ab + b²) ]