Question

Help me please. Don't answer if you will be toxic. ☣

Answer 1

Try this: 3*125^(1/3). Note that 125^(1/3) = 5 and that the original expression is now 3*5, which = 15, as required.

Answer 2

15 = 3² +2(7-4)

____

The above expression includes operations of

• exponentiation
• subtraction
• multiplication
• addition

The exponent is 2.

I know the value of this expression is 15 because

• I designed the expression to have a value of 15
• I get a value of 15 when I evaluate the expression
• A reliable on-line calculator also gets a value of 15 when it evaluates the expression