$2\left(3xy\right)\left(5xy\right)$
$\left(a^{x+1}2b^{x-1}\right)\left(2b^{x-1}+a^{x+1}\right)$
$x^2+5x+14=0$
$c^2-13c-30=0$
$9x+30=-15$
$8\left(7\right)^4-9\left(7\right)^2+15\left(7\right)-7$
$\left(9x^2-3x+5\right)-\left(9x^2-7x-6\right)$
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