Social Algebra: A learning tool

Horizontal Chain = Multiplication, Vertical Chain = Division and the
circles indicate whether their contents are all negative or all positive (counterclockwise negative)

The Y intercept, as penned in Sidewalk Chalk.

More Pavement-Art to come

Find the arrows that point to an improper simplification. Find the answer by identifying these mistakes.

Just in case you forgot to write it on your hand.

Here's a more complicated example.