2(2x-1)(2x+1)-5x(-x+3y)+4x(-4x^2-5/2y),
=2(4x^2-1)+5x^2-15xy-16x^3-10xy
=-16x^3+13x^2-25xy-2
=-16*(-1)*2+13*1-25*(-1)*2-2
=93
2(2x-1)(2x+1)-5x(-x+3y)+4x(-4x^2-5/2y),
=2(4x^2-1)+5x^2-15xy-16x^3-10xy
=-16x^3+13x^2-25xy-2
=-16*(-1)*2+13*1-25*(-1)*2-2
=93