$12x-15-12x=7x+20$
$\left(t^2+5\right)\left(t^2\:+9\right)$
$\left(\:a^2\:b^3\right)^1$
$x^2=108-3x$
$100\:x\:547^1$
$\int\arcsec\left(w\right)dw$
$18x^2-32x$
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