14. Find the first derivatives of: (a) y = -Tex (b) y = e- 3x2 ( c) y = ex (d) y = ex In(x2+2) (e) y = e5x3 (f) y = 2 - xex (g) y = (ex + x2) 10 (h) y = In (vx+1) SM 15. Find the intervals where the following functions are increasing: (a) y = (Inx)2 -4 (b) y = In(ex +ex) (c) y = x - > In(x2 +2)