$4r^2+112r-92=0$
$12xy^2+8-10xy^2+2$
$6a+9a+6a$
$9z^4-6\sqrt{78}z^4-78z^2$
$7\left(-2r+60\right)+4\left(8r-6\right)$
$\frac{1}{25}\int xe^{-\frac{x}{5}}dx$
$\left(-2.\sqrt[4]{\frac{ab^2}{16}}\right)^3$
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