$\left(3m^5h^3x+10nwy\right)^2$

$2\cdot\frac{1}{2}+3\cdot\frac{2}{3}\cdot4\cdot\frac{1}{4}+4$

$2.\:\left(3t\:+7\right)\:\left(3t\:+\:2\right)\:\cdot$

$2\left(2\right)^{4}\left(-7\right)+\left(2\right)\left(-1\right)^{3}-8\left(2\right)^{2}\left(-1\right)^{2}$

$\left(7ab^2-2a^2b\right)^2$

$x^{2+21-10=0}$

$4+\sqrt{2x}$