If you could make sure that the following problems are done right, it would be great. Evaluate expressions by using the order of operations (PEMDAS).

1. xm - 2m if x= -2 and m= -3
(-2) (-3) - 2 (-3)
(-2)(-3)= 6
2(-3)= -6
6 minus negative 6 means 6 plus 6, so the ans. is 12

2. 2abc - 3ab if a= 2, b= -3, c=4
2(2)(-3)(4) - 3(2)(-3)
2(2)=4(-3)= -12(4)= -48
3(2)=6(-3)= -18
-48 minus -18 means -48 plus 18, so the ans. is -30

3. -x(y+z) if x=4, y= -3, z= -5
-(4)((-3)+(-5))
((-3)+(-5))= -8
-(4) means -1(4), which equals -4
-8 times -4 equals 32 (ans.)

Question

If you could make sure that the following problems are done right, it would be great. Evaluate expressions by using the order of operations (PEMDAS).

1. xm - 2m if x= -2 and m= -3 
(-2) (-3) - 2 (-3)
> (-2)(-3)= 6
> 2(-3)= -6
>6 minus negative 6 means 6 plus 6, so the ans. is 12

2. 2abc - 3ab if a= 2, b= -3, c=4
2(2)(-3)(4) - 3(2)(-3)
>2(2)=4(-3)= -12(4)= -48
>3(2)=6(-3)= -18
>-48 minus -18 means -48 plus 18, so the ans. is -30

3. -x(y+z) if x=4, y= -3, z= -5
-(4)((-3)+(-5)) 
>((-3)+(-5))= -8
> -(4) means -1(4), which equals -4
> -8 times -4 equals 32 (ans.)