The virtue of catching up with the opening takbeer is not cancelled out by putting two prayers together in the mosque

What should a person who joined the prayer late do, if the imam made a mistake and said the tasleem after the third rak‘ah of a four-rak‘ah prayer, then remembered and stood up to do a fourth rak‘ah?

They prayed behind someone who did not say the takbeer and tasleem out loud; what is the ruling on their prayer?

He decided (and formed the intention) to carry on praying on his own because the sound of the imam’s voice was cut off, then the sound was restored, and he found that he had gone ahead of his imam in the prayer. What is the ruling?

They refuse to pray in congregation on the grounds that the imam charges a fee for leading the prayers!

He recited quietly at the beginning of his prayer, then someone else joined him; should he complete it reciting quietly or out loud?

Ruling on the imam standing on the far left of the musalla and ruling on the worshippers near him standing on his right

Should they pray behind someone who says that Allah is everywhere?

Can the one who comes late to the prayer pull back the person who is standing next to the imam if he is bowing, or should he just stand next to him?

It is obligatory to straighten the rows and make them complete (by filling any gaps) when praying