Solution:

I(1) + ate(2^3 is 8) + Some(Sum symbol) + Pie(Symbol)
= I Ate Some Pie and It Was Delicious

Solution:

No U Turn

Solution:

Open doors.

Solution:

Greenhouse.

Solution:

Equal rights

Solution:

bear

Solution:

O + Pi + nion (Pi In Onion)
= Opinion

Solution:

MOB + I(pointing to me) + Le (Bruce Lee) = MOBILE.

Solution:

FUCK

Explanation:
IF sound like the letter 'F'
YOU sound like the letter 'U',
SEE sound like the letter 'C',
KAY sound like the letter 'K'.

It's a clever way to use word fuck and it does not get blocked by filters.

Solution:

I Over Ate

Explanation:
Check the mathematical solution on the image below.
Also, 8 in 2018 resembles a fat person.