A more thorough explanation:

A public express trust is a type of charitable trust that has a specific purpose that benefits the community or a particular group of people. For example, a trust that provides funding for education or healthcare would be considered a public express trust.

These types of trusts are favored by the law and receive certain advantages. For instance, the remainder interest in a public express trust is not subject to the rule against perpetuities, which means that the trust can continue indefinitely.

One example of a public express trust is the Bill and Melinda Gates Foundation, which is dedicated to improving global healthcare and reducing poverty. Another example is the Ford Foundation, which provides funding for education, human rights, and other social justice causes.

These examples illustrate how public express trusts can have a significant impact on society by providing funding and resources for important causes that benefit the community as a whole.