Respuesta:
[tex]-236\div \:2\left(6+8\cdot \:7-3\right)=-6962[/tex]
[tex]10\left(-9\right)\div \:12+3\left[4+5\left(6-7\div \:8\right)\right]\cdot \:0=-\frac{15}{2}[/tex]
[tex]2^2+2\div \:8-5\left[3+6\left(5^2\cdot \:7\div \:8\right)\cdot \:3\right]\div \:5\cdot \:2=-\frac{3157}{4}[/tex]
