$10g^3-20g^2+25g$
$\left(4k+3h\right)^2$
$x ^ { 4 } - x ^ { 3 } - 3 x ^ { 2 } + 3 x$
$3-9+4-8-2+13$
$43+51+65-94+12-86$
$\left(9-6x^2\right)\left(6x^3+9\right)\left(81+36x^4\right)$
$\sqrt[2]{-\frac{4}{7}}$
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