[tex]\left \{ 3 \cdot 6\cdot [3-6 + 2 \cdot \frac{3 \cdot\frac{ 6}{2} +3-2} {4} ]+3 \right \}+31 =\\\\= \left \{18\cdot [ -3 + 2 \cdot \frac{3 \cdot 3 +1} {4} ]+3 \right \}+31 = \\\\=\left \{18\cdot [ -3 + \frac{10} {2} ]+3 \right \}+31 = \\\\= \left \{18\cdot [ -3 + 5 ]+3 \right \}+31 = \\\\=\left \{18\cdot2+3 \right \}+31 = (36+3)+31=39+31=70[/tex]
