B=e72x+y−1B=e^{\frac{7}{2}x+y-1}B=e27x+y−1
B=e(x+y)(2x−1)B=e^{(x+y)(2x-1)}B=e(x+y)(2x−1)
B=e12x2+xy−1B=e^{\frac{1}{2}x^2+xy-1}B=e21x2+xy−1