Enter five million, twenty thousand, twenty six in expanded form

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Which of the following is true for the relation f(x)=2x^2+1

Consider the function f(x)=-5x+3 what is f(-2)