) + 1)      </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    ⎢                                                                             </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    ⎢                                         2                                 2 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    ⎢(-x + x₀)⋅exp(b₁⋅(x - x₀))    b₀⋅(x - x₀) ⋅exp(b₁⋅(x - x₀))   2⋅b₀⋅(x - x₀) ⋅</span>
<span class="r-out c