$\frac{x}{9}^2+2xy+9y^2$
$\lim_{x\to0}\left(cos\left(3x\right)^{\frac{5}{x}}\right)$
$8x-3x+4x-9x$
$1-5-\left(-3-2-1\right)+\left(-5+7-3\right)$
$10\left(x\:+\:2\right)\:=\:9x\:+\:20\:+\:x$
$44y+17+2y-46y+11$
$6x^2y^2\left(2a+3\right)+3+2a$
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