X÷14=15 need Help to answer this question​

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?