$x^2-5x-4\ge0$
$\frac{1.219-1}{0.02}$
$3y+x^4\frac{dy}{dx}=2xy$
$10x-3\left(x-6\right)+x+30$
$10\frac{di}{dt}+20i=250$
$\frac{dy}{dx}=\frac{x^2-1}{y^2+1}$
$46+\left(-5\right)^3-3x\left(-2\right)^3$
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