1. Factorise the expression by taking binomial commonly out

4 q^{2} (19 q - 1) - 19 q + 1

$(19 q - 1) (4 q^{2} - 1)$
$(19 q + 1) (4 q - 1)$
$(19 q + 1) (4 q^{2} + 1)$

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