my awesomest math puzzle

(A+B)(B-B)
ARCHIMEDES
BRAMHAGUPTA
DAVIDHILBERT
HIPPOCRATES
INTEGERS
IRRATIONAL
ISAACNEWTON
RATIONAL

it contains all math stuff

Try to find all 9 words on this board.

H D R O N A H S H E L C A Q T
I W O Q O J O R Y Y P N P W J
P Q C P T W Z E D Y C I T L E
P I S J W F P G R H C R L U R
O R E L E F N E R O E A B E B
C E D N N T T T L B N T R ( D
R D E F C Q H N L O J A A U F
A Z M F A W G I I L T + M Z F
T H I K A U H T S I B Q H D L
E I H K S D A D O ) W M A E V
S A C U I R W N ( W W S G K P
X W R V R T A B Z R A Q U U U
Y L A I M L - X I X U V P K Z
N D O G Z B Y W C L A X T B S
D R M Z ) A E H E X X B A L F
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Answer Key for my awesomest math puzzle

X
Y
123456789101112131415
1H # # # N # # S # # # # # # #
2I # # # O # # R # # # # # # #
3P # # # T # # E # # # # T # #
4P # S # W # # G # # # R L # #
5O # E # E # # E # # E A B # #
6C # D # N # # T # B N # R ( #
7R # E # C # # N L O # A A # #
8A # M # A # # I I # T + M # #
9T # I # A # H T # I B # H # #
10E # H # S D A # O ) # # A # #
11S # C # I R # N ( # # # G # #
12# # R V R # A B # # # # U # #
13# # A I # L - # # # # # P # #
14# D # # # B # # # # # # T # #
15# # # # ) # # # # # # # A # #
Word X Y Direction
(A+B)(B-B)  137sw
ARCHIMEDES  313n
BRAMHAGUPTA  135s
DAVIDHILBERT  88ne
HIPPOCRATES  11s
INTEGERS  88n
IRRATIONAL  413ne
ISAACNEWTON  511n
RATIONAL  136sw