What's 2+2 this is just to see if someone will answer

Multiply. −2x(6x4−7x2+x−5) express the answer in standard form. enter your answer in the box.

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq