Solution:

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

Solution:

Accelerate

Solution:

Pedro Rodrigues Filho was Mass Murderer.

Density multiplied by volume equals mass.
Therefore, Pedro Rodrigues Filho killing mass would mean Pedro Rodrigues Filho was a MASS murderer

Solution:

Paradise

Solution:

Stand up comedy (stand up comma D)

Solution:

Three blind mice.

Explanation.
There are no i's in mice

Solution:

Nice Personality.

Explanation:
N + ice + Purse on "ality" =>Nice Personality

Solution:

I am surrounded by the enemies.

Solution:

common sense

Explanation :
We can break it into the following three parts
ITIT
,N
CENTCENT

Now ITIT = 2 Its which can be molded into IT's
,N = Comma + N which can be molded into Common
CENTCENT = 2 Cents which can be molded into Sense

So, the letters basically represent:
It's common sense.

Solution:

Circle Under the Eyes.