Derivative Quadruple Product Rule

Quadruple Product Rule

$f(x)=p(x)\ast q(x)\ast r(x)\ast s(x)$ $f^{\prime }(x)=p^{\prime }(x)q(x)r(x)s(x)+p(x)q^{\prime }(x)r(x)s(x)+p(x)q(x)r^{\prime }(x)s(x)+p(x)q(x)r(x)s^{\prime }(x)$