Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Which group of Mnemiopsis are hardest to study no sorry which group of ctenophore rather?
Which group of ctenophore are are hardest to study?

What meetings are open umm I mean closed to the public?
What meetings are closed to the public?

What equation has consequence no the described the physics of force before the current Schrodinger equation?
What equation desribed the physics of force before the current Schrodinger equation?