The m power of 2x minus the M + power of 2Y plus 7 times x times m + 1 minus the m power of y plus 1 minus the m power of 3 times x minus the m power of 2Y

The m power of 2x minus the M + power of 2Y plus 7 times x times m + 1 minus the m power of y plus 1 minus the m power of 3 times x minus the m power of 2Y

The m power of 2x minus the M + power of 2Y plus 7 times x times m + 1 minus the m power of y plus 1 minus the m power of 3 times x minus the m power of 2Y
=2x^m-2y^m+1+7x^m+1-y^m+1-(3x^m-2y^m)
=9x^m-3y^m+1-3x^m+2y^m
=6x^m-3y^m+1+2y^m