It is a set of three algebraic expressions.
The browser which is used by this site for posting questions is utter rubbish for mathematical questions because it rejects most mathematical symbols. It is therefore not possible for us to see the question that you wanted to post. Unfortunately, the powers that be at this site will not or cannot sort this mess out.
H
The formula for H plus 1 plus H minus 1 is 2H. This is because the +1 and -1 charges cancel each other out, leaving only the H atom.
The formula for hydrogen plus hydrogen is H + H, which combines to form the molecule H2.
H+ or a proton.
(b+h)(b+h)= b2+2hb+h2.
I would tell, no reaction will occur the way the question has been asked.
That depends on the value of h.
h + 6h = 7h
Y?
3h + 20 - h + 5 = 2h + 25
A
The answer is H - 8