$+23-53-98$
$2a^2-a+3$
$\sec\left(a\right)\frac{h}{ca}$
$125\cdot5$
$5\left(4m+4\right)+3\left(2m+6\right)$
$\frac{dy}{dx}=2y+x^2$
$3x^2-12x+12$
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