A very powerful weapon of mass destruction. It is not known how math teachers have not yet taken their own lives (although they would do
well because they are as useful as a cactus in the
ass). There are no
people who
like mathematics, it was invented only to ruin our lives. Obviously, at first everything will seem clear, but already after the second lesson you will already be looking at the window of your class and thinking "Oh come on, the world will not be destroyed with one less person out of 7 Billion