$-16a^2b+8a+7a^2b-6a+10-24a^2b-a$
$2a^2bc-3ab^2c+5abc^2$
$9\ge r+7$
$\frac{15y^3}{y}$
$5x\:-\:2\:\left(x+1\right)=\:10\:-x$
$\frac{\tan x+2}{\sec x}=2\cos x+sin\:x$
$\frac{x^{12}-a^{18}}{x^2+a^3}$
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