$-5\left(7-2z\right)$

$\frac{3m^1-6m^{1-3}+45m^{1-4}}{3m^{1-4}}$

$\frac{1-\sin^2\left(x\right)}{\sin\left(x\right)}=\csc\left(x\right)-\sin\left(x\right)$

$\left(3x-5\right)\left(6x^2-7\right)$

$\left(\sqrt{x}-\sqrt{a}\right)^3$

$-\left(-6+8-8-9\right)+\left(-5+8-7+3\right)-8+3$

$\left[-\left(5-28\right)-\left(-17\right)\right]$