can you help with this LONG problem showing steps would really help
a)
(x^2-2x-15/x^2-x-6)/x^2-5x/x^2-4
b)
6/x-1 minus x+2/x
c)
(x+3)^2-2(x+1)
d)
1/x+1/y divide x- 1/1/xy