Basically find the prime numbers that multiply to make that number or the base parts so
90=2 times 45
45=3 times 15
15=3 times 5
prime factor=2 times 3 times 3 times 5
The answer is -59 , you have the wrong answer choices

, as it starts with 7, and subtracts 4 each time.
Step-by-step explanation:
a=4 so 3a becomes 3x4.
3x4=12
12+6c^2
C=2 so 6c^2 becomes (6x2)^2
6x2=12 and 12x12 because of the exponent.
12x12=144
12+144=156
If it's wrong, i'm sorry