#14 and #15. Please give a detailed math response.

For each problem, find the domain, range, intercepts, asymptotes, intervals of increasing/decreasing, intervals of concavity, critical points, points of inflection and sketch the graph. 1. y =1- 3x +5x2 - x3 V1- x2 14. y = X x+1 2. ) y = x4 -6x2 15. y = Vx2 + 1