(i) -4 * = * -4

This is because of the use of cumutative law

According to commutative law:

* = *

(ii) * = *

This is because of the use of cumutative law

According to commutative law:

* = *

(iii) * ( + ) = * + *

This is because of the use of distributive law

According to distributive law:

* + * = * ( +)

(iv) * ( + ) = ( * ) + *

This is because of the use of distributive law

According to distributive law:

* + * = * ( +)