$800+30+3+1.4+0.34$
$-10\left(3+2\right)$
$-2\le\frac{x-1}{x+3}$
$64f^4-16+64f^2$
$\left(x^2+2x+4\right)^2$
$sin^2x+4cos^2x=1+3cos^2x$
$\:100\cdot\:6n^2x^2-150\cdot\:6n^2x^3+200\cdot\:6n^3x^3$
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