$5x^2+10x+25$
$e ^ { 1 } - e ^ { - 1 }$
$\left(a^{2}b\right)\left(a^{2}\right)$
$14x-6$
$1-\left(-4\right)\cdot\left(-1\right)$
$x-3<3x+6$
$\left(3x+2a\right)\left(5x-8\right)$
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