-3 $\sqrt{7}$
You asked:
Evaluate the expression: \(-\left( 3 \cdot \sqrt{7} \right)\)
MathBot Answer:
\[-\left( 3 \cdot \sqrt{7} \right) = - 3 \sqrt{7} \approx -7.93725393319377177150484726091778\]
\[\begin{aligned}-\left( 3 \cdot \sqrt{7} \right)& = - 3 \cdot \sqrt{7}\\& = -3 \cdot \sqrt{7}\end{aligned}\]