题目化简:(1)2x+(5x−3y)−(3x+y)(1)2x+\left(5x-3y\right)-\left(3x+y\right)(1)2x+(5x−3y)−(3x+y)；(2)3(m−2n+2)−2(m−3n)−1(2)3\left(m-2n+2\right)-2\left(m-3n\right)-1(2)3(m−2n+2)−2(m−3n)−1.知识点：提公因式法、运用公式法、分式的基本性质、分式的乘除法、分式的化简求值、分式的加减法章节：未标注
