$3\cdot\left(-1.45\right)^2+3\left(-1.45\right)-2$
$3x^2-9x+x^2-9$
$\:10y\:+\:-15x\:+\:\:28x\:+\:-35y\:+\:21$
$7^8$
$-\left(2+6-9\right)$
$\frac{\left(2x^3-3x+4\right)}{\left(x^2+9\right)}$
$49x^2-98x+58$
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