$1250-378$
$\left(-3^2\right)\cdot\left(-4^3\right)$
$x^2-18x-12=0$
$4-3sin^2x$
$42+42+42+42$
$x^2-10x+28=7$
$-\frac{3}{4}e^{2x}x^2+5x^2$
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