What value should come in place of the question mark (?) in the following question?

52x14+145018=1998÷?

Bob Kashir deposited $6000 in a 4-year certificate of deposite paying 5% compounded daily.He withdrew the money 15 months later.The passbook rate at his bank is 3.5 % compounded daily.Find his amount of interest

Find the compound amount if $1200 is deposited at 8% interest for 11 years if interest is compounded continuously

Find the compound amount if $2900 is deposited at 5% interest for 10 years if interest is compounded daily

$32000 is invested at 10% for 2 years.Find the interest compounded Yearly

Example:$800 is invested at 7% for 6 years.Find the interest compounded anually?

Dianna deposits $725 into a savings account that pays 2.3% simple annual interest. How much interest will Dianna earn after 18 months?

A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interst. The rate per annum 

If a sum of money at simple interest doubles in 6 years, it will become  4 times in