The phrase "adding all of this" is correct and usable in written English.
It can be used when summarizing or concluding a discussion by incorporating various points or elements previously mentioned.
Example: "Adding all of this, we can conclude that the project will require more resources than initially anticipated."
Alternatives: "considering all of this" or "taking all of this into account".
Speaking after the ceremony, DiCaprio said he was "shocked and amazed, honoured", adding: "All of this was not expected tonight".
A Goldman Sachs spokeswoman dismissed the report on the fund, adding, "All of this is purely speculation by industry executives".
By adding all of this technology to kids' toy lineup, they will also be able to get the basics of skills like programming down at an early age, becoming prepared for a tech-laden future.
He added: "All of this is unfair and unacceptable".
He added: "All of this is massive in scope.
She added: "All of this measuring of learning, and monitoring of progress, and keeping up this insane level of pressure on teachers, has got nothing to do with education.
He added: "All of this would fly in the face of the commission's own impact assessment, which highlights the clear economic and employment benefits of pushing for ambitious binding targets for greenhouse gas reduction, renewable energy and energy savings".
But he added: "All of this is not to say that the intelligence and law enforcement communities couldn't have done more to protect the nation from a Sept. 11.
Sophie Allain, of the Campaign for Better Transport, said that they welcomed discount fares and more smart and integrated ticketing but added: "All of this will be overshadowed if operators are allowed to charge premium fares on busiest services".
As Apple's Craig Federighi noted today, Apple wants to add all of this information while ensuring the user's privacy.
One big challenge for SoundCloud will be how the platform adds all of this without compromising itself.
