title: transform equation with Mathematica
body: <p>I'm try to use Mathematica to transform a couple of komplex equations, but I didn't get the right syntax.</p>
  
  <pre><code>Solve[{EI*w[x] == Piecewise[{{(x - a)^3, x &gt;= a}, {0, x &lt; a}}]*F*(1/6) + 
  ca*(x³)*(1/6) + cb*(x^2)*0.5 + cc*x + cd,
  EI*w'[x] == Piecewise[{{(x - a)², x &gt;= a}, {0, x &lt; a}}]*F*0.5 + ca*(x^2)*0.5 + cb*x + cc, 
  EI*w''[x] == Piecewise[{{(x - a)^1, x &gt;= a}, {0, x &lt; a}}]*F + ca*x*0.5 + cb, 
  EI*w'''[x] == Piecewise[{{(x - a)^0, x &gt;= a}, {0, x &lt; a}}]*F + ca, 
  w[0] == -EIw'''[0]/ka, w[l] == EIw'''[0]/kb, w'[0] == 0, w'[l] == 0},
  {ca, cb, cc, cd}]
  </code></pre>
  
  <p>Can someone give me a hint how to solve these equations with Mathematica. </p>