What is the effect of inserting parentheses into a numerical expression

Adisease that is characteristic of a particular local region is called:

Children's reactions to divorce often include which of the following groups of behaviors? a. resentment, anxiety, guilt, and anger b. joy, relief, and happiness c. talking too much and desiring dramatic play d. attachment to adults and seclusion from other children

Amalignant tumor that originates within glandular tissue is called