$10x-4-2x+19$
$\int2e^{\frac{2}{1+e^3}}dx$
$3-4\cdot5-7$
$3x\left(2+x\right)=6+3x$
$\left(2x+3\right)^2-\left(2x-3\right)^2+\left(3x-4\right)^2-8x^2+16$
$3x^2+2y^2+12y-24x+60=0$
$x^2\frac{2}{9}x+n$
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