$\left(3a^2-\frac{2}{5}b^3\right)^2$

$4\cdot\left(-5\right)-23$

$\lim_{x\to0}\left(\frac{\sin\left(2x\right)\left(1-x\right)^2}{\ln\left(\cos\left(x\right)\right)}-1\right)$

$x^2-x+72$

$\left(d^{\frac{1}{2}}\right)^2$

$\frac{27a^{6}b^{5}}{3ab^{4}}$

$x^2-1\cdot\frac{x^2}{2}$