1/4x^2y-3x^2+3/4x^2y+2x^2

问题描述:

1/4x^2y-3x^2+3/4x^2y+2x^2
合并同类项

1/4x^2y-3x^2+3/4x^2y+2x^2
=1/4x^2y+3/4x^2y+2x^2-3x^2
=x^2y-x^2