$\frac{dx}{dt}=\frac{5x+2}{-7t^5}$
$0.5\left(x^4-3\right)+12$
$5+.-3$
$3x^2-7x-6=0$
$9\left(2x+2y\right)$
$\left(2-2x^2\right)^3$
$12-x<6+x$
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