title: Problem simplifying the following expression
body: <p>I am using the library Sympy, this is the code:</p>
  <pre><code>import sympy as sp
  β, t, t1=sy.symbols(&quot;β t t+1&quot;)
  ((β**t1)/(β**t)).simplify()
  </code></pre>
  <p>What I want to get is:</p>
  <pre><code>β
  </code></pre>
  <p>but what I am receiving is:</p>
  <pre><code>β**(−++1)
  </code></pre>
  <p>You can see that the code is not subtracting the ts, any help?</p>