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.

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

X
Y
123456789101112131415
1# A T P U G A H M A R B # # #
2# D # # # # # # # # # # S # #
3# ( A + B ) ( B - B ) # E # #
4# # R V # # # # # # # # T # #
5# # C # I R R A T I O N A L #
6# # H # S D # # # # # # R # #
7# # I # A # H # # # # A C # #
8# # M # A # # I # # T # O # #
9# # E # C # N # L I # # P # #
10# # D # N T # # O B # # P # #
11# # E # E # # N # # E # I # #
12# # S G W # A # # # # R H # #
13# # E # T L # # # # # # T # #
14# R # # O # # # # # # # # # #
15S # # # N # # # # # # # # # #
Word X Y Direction
(A+B)(B-B)  33e
ARCHIMEDES  33s
BRAMHAGUPTA  121w
DAVIDHILBERT  88se
HIPPOCRATES  1312n
INTEGERS  88sw
IRRATIONAL  55e
ISAACNEWTON  55s
RATIONAL  136sw