$\frac{5x-4}{5}$
$h^2\:-\:9h\:-\:8$
$144 \times 4 ^ { 4 } - 819 ^ { 4 } b ^ { 2 }$
$y=\left(2x-5\right)^2$
$3m^2+8m+5$
$0y^3$
$4x^2+11x-20$
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