$x ( 4 x ^ { 2 } + 5 ) ^ { \frac { 2 } { 2 } }$
$\sqrt{250}$
$-\frac{40}{-20}$
$\frac{8x^{5}+4x^{4}+6x^{2}+6x-1}{4x^{2}-4x+2}$
$13x=91$
$\left(2x^3y^2z^{-1}\right)\left(3x^2y^{-2}z^3\right)^{-2}$
$-8748-6561$
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