The operation ⊗ is defined by x⊗y=xexp2/y+x/y for all numbers x and y, where y≠0. What is the value of (9⊗(−9))+((−9)⊗9))?

GMAT QUANT Problem Solving level 600, Functions And Custom Characters
The operation ⊗ is defined by x⊗y=xexp2/y+x/y for all numbers x and y, where y≠0. What is the value of (9⊗(−9))+((−9)⊗9))?

A. -4
B. -3
C. -2
D. 1
E. 2