$7-2x<1$
$3\left(1+2x\right)+\left(3-x\right)+4\left(x+1\right)-1$
$\lim x\to0\left(1-2x\right)^{\frac{13}{x}}$
$\frac{x^5}{\left(\left(x-1\right)\left(x^2+x+1\right)\right)}$
$4^2\cdot5^2\cdot3^0$
$\left(6-4x-6y\right)^2$
$xy^2z^4;\:x=3;\:y=-2.z=1$
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