Lindsay has 4 x 4 = <<4*4=16>>16 brown-haired dolls.
She has 16 - 2 = <<16-2=14>>14 black-haired dolls.
Thus, Lindsay has 16 + 14 = <<16+14=30>>30 black and brown hair dolls combined.
Therefore, she has 30 - 4 = <<30-4=26>>26 more dolls with black and brown hair combined than blonde-haired dolls.
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