This also has a problem if there are multiple spaces before the marker as it only removes one space.

The answer to this question contradicts the description of the kata.
In the kata description it states:

For example, solve("tft","^&") = 2, as follows:

"((t ^ f) & t)" = True
"(t ^ (f & t))" = True

However, in Example 1 above, three possibilities are given, applying this to the example from the description gives:

t ^ (f & t) = True
(t ^ f) & t = True
t ^ f & t = True

So, there are three expressions that evaluate to true, not 2 as given in the kata description. This kata needs further clarification, another example would help.