\( \dfrac{\dfrac{31}{2}*\dfrac{\left(-16\right)}{\left(-1\right)}}{\dfrac{13}{2}+\dfrac{\left(-5\right)}{2}}+\sqrt{\left(51-7-33\right)\left(31*\left(-1\right)+\dfrac{\left(-84\right)}{\left(-2\right)}\right)} \)