Hey there!!
( a ) Let's take the number as ' x '
Multiply the number with 2 and then add 4
= 2x + 4
( b ) Let's take the number as ' x '
Add 4 and then multiply whole by 2
2 ( x + 4 )
( c ) Let's take the number as ' x '
Divide by 5, then add 6
x / 5 + 6
= x + 30 / 5
( d ) Let's take the number as ' x '
Add 6 and then square it
= ( x + 6 )²
= x² + 12x + 36
( e ) let's take the number as ' x '
subtract by 5 and then divide by the number
x - 5 / x
Hope my answer helps!