$\:t^2+\:9t\:+\:81$
$-209-373$
$\left(\frac{log\left(x\right)}{7+log\left(x\right)}\right)=y$
$11-8\left[15-3-12\left(+8-3+5\right)\right]$
$\left(x-a\right)^2+\left(y\:-b\right)^2\:=\:\left(x-c\right)^2+\left(y-d\right)^2$
$x\cdot4^{8\:}\:$
$2x^2+16x+12$
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