Due to this tax reform, the cumulative imposition has increased.

The government is considering cumulatively imposing a new tax on existing taxes.

I am currently studying the third section of mathematics.

We believe that we need to reform the education system.

We believe that a reform of the education system is necessary.

The population is increasing rapidly.

The taxation system in Japan is complex and difficult to understand.

We decided to start a new project by joining our companies.

I forgot my homework.

I accidentally left the window open.