Answer:
Subtract 
Step-by-step explanation:
Given

Required
The first step to evaluate the expression
The first step is to evaluate the expression in brackets.
From the question: The expression in bracket is: 
So, the first step is to subtract 
Answer:
-4 - 20z sorry if I'm wrong
Answer:
6
Step-by-step explanation:
2*3*6=12
12/2=6
formula= b*h/2
Answer:
12k-18
Step-by-step explanation:
u multiply 6(2k)-6(3) and ur answer will be 12k-18
Answer:
2.51 cubic meters
Step-by-step explanation:
plug into formula calculator.