题目计算:(1)x3⋅x5−(2x4)2+x10÷x2(1)x^{3}\cdot x^{5}-(2x^{4})^{2}+x^{10}\div x^{2}(1)x3⋅x5−(2x4)2+x10÷x2；(2)[(m+n)(m−n)+(m−n)2−4m(m−n)]÷2m(2)[\left(m+n\right)\left(m-n\right)+\left(m-n\right)^{2}-4m\left(m-n\right)]\div 2m(2)[(m+n)(m−n)+(m−n)2−4m(m−n)]÷2m.知识点：分式的混合运算章节：数与式 / 分式
