Write the expression. then, check all that apply! a number cubed increased by four “a number cubed” is a power, where the base is the variable, n, and the exponent is 3. “a number cubed” is a power where the base is 3 and the exponent is n. “increased by 4” means add 4. “increased by 4” means multiply by 4. the expression is written as n3 + 4. the expression is wriitten as 4n3