PLEASE HELP. Simplifying question

Answer:
The final answer is-925x+3
Step-by-step explanation:
The problem to solve is:
3-5x10-7x125
Multiply x and 5
Multiply x and 1
The x just gets copied along.
The answer is x
x
5*x evaluates to 5x
Multiply 10 and 5x
Multiply 1 and x
The x just gets copied along.
x
5*x*10 evaluates to 50x
3-5*x*10 evaluates to 3-50x
Multiply x and 7
Multiply x and 1
The x just gets copied along.
The answer is x
x
7*x evaluates to 7x
Multiply 125 and 7x
Multiplying 1 and x
The x just gets copied along.
x
7*x*125 evaluates to 875x
-50x - 875x = -925x
The answer is -925x+3
3-5*x*10-7*x*125 evaluates to -925x+3
The final answer is-925x+3
_______________________________________
The problem to solve is:
15-5x6-7
Multiply x and 5
Multiply x and 1
The x just gets copied along.
The answer is x
x
5*x evaluates to 5x
Multiply 6 and 5x
Multiply 1 and x
The x just gets copied along.
x
5*x*6 evaluates to 30x
15-5*x*6 evaluates to 15-30x
15 - 7 = 8
The answer is 8-30x
15-5*x*6-7 evaluates to 8-30x
The final answer is8-30x