$y^2-5y-5+2y^2+10y+3$
$27x-16+33y-42-19x$
$x^3:x$
$\left(6c+d\right)\left(6c-d\right)$
$2cos^22x=-3sin2x$
$\frac{\left(3.9\right)^{20}}{\left(3.9\right)^{10}}$
$\int\frac{1}{\left(36+x\right)\sqrt{x}}dx$
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