$16+40a^2+25a^2$
$\left(-1\right)\left(-12\right)-12\cdot\left(-3\right)$
$3^{\left(3x-8\right)}=9^{\left(x+2\right)}$
$de\:3x^2y,restar\:-8x^2y$
$e=125^{9^{-4^{-2^{-1}}}}$
$\left(x+5\right)\left(x+1\right)+4y^2x+4y$
$\left(x-2\right)\left(2x-5\right)=0$
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