题目计算:(1)(−a)3⋅a2+(2a4)2÷a3(1)\left(-a\right)^{3}\cdot a^{2}+(2a^{4})^{2}\div a^{3}(1)(−a)3⋅a2+(2a4)2÷a3；(2)(x+2)(x+3)−x(x−1)(2)\left(x+2\right)\left(x+3\right)-x\left(x-1\right)(2)(x+2)(x+3)−x(x−1).知识点：有理数的混合运算章节：数与式 / 有理数
