The expression that could best describe the statement would be " 40 n + 20

260.
Answer: 693
it is 693 because...
I couldn't really explain with words so I gave you a step by step of my work.
Opposite of the integers:
+56
+340
-39
-201
-1124
Solid figures:
Cube
Rectangular prism
Cylinder
Octahedron
Triangular pyramid