Tangent Line Equation?

At ( x , f(x) ) the slope of the tangent line to the graph of f(x) is given by the formula 4x^3 - 2x + 3 . If the tangent line at ( 1 , f(1) ) has equation y = 5x - 8 then (in calculator syntax) f(x)= ANSWER and f(2) = ANSWER.