$2+2x=20$
$\left(6x^2+4x-9\right)\left(5x+1\right)$
$3\left(y-2\right)-4y=2\left(y-9\right)$
$2yx^2\cdot8x^3$
$\int\:\frac{2a+2bx^2}{\sqrt[3]{3ax+bx^3}}dx$
$\left(x-2\right)^2\ge\:\:0$
$x+2+3+y+z-4+x+2+y+3+z-4$
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