ag-gipp/GoUldI

Integrate::nodiffd: 
      (1 +, 0 +, 1 -, 0 -)  a - 1        b - 1
   ∫                     t      (1 - t)      dt
      P
     cannot be interpreted. Integrals are entered in the form ∫ f  x
          b
     , ∫  f  x, or       ∫       f, where  is entered as dd.
          a             vars ∈ region

ToExpression::esntx: 
   Could not parse \int_{P}^{(1+,0+,1-,0-)}t^{a-1}(1-t)^{b-1}\mathrm{d}t=-4e^{
     \pi i(a+b)}\sin\left(\pi a\right)\sin\left(\pi
     b\right)\mathrm{B}\left(a,b\right) as input.

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mi>$Failed</mi>
    <annotation-xml encoding='MathML-Content'>
      <ci>$Failed</ci>
    </annotation-xml>
  </semantics>
</math>