6x3+49x2+126x+104 (I just simplified it, if it is incorrect I'm sorry I didnt understand what you were asking -,^-)
Making the assumption that your problem looks like this,

we use the distributive property to multiply:
Answer: 31
Step-by-step explanation:
Order of Operations: PEMDAS
Multiplication comes first so you do −2⋅3 which equals -6
Then you can add 5 to -6,
or subtract -6 from 32.
The answer I'm pretty sure is B but I can't really explain it, sorry