CANBERRA (Reuters) - Australian Prime Minister Julia Gillard expressed confidence on Tuesday she would end a damaging mining tax row, as speculation grew she may call a quick election to capitalize on her honeymoon period as new leader.

Mining industry groups suspended a hostile advertising campaign against the tax after Gillard ousted Kevin Rudd last week and promised to negotiate with the industry over the 40 percent tax, designed to raise A$12 billion ($10.5 billion).

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