$9x^3y-10x^3y+4x^3y+13x^3y-x^3y$
$\left(2x^2-5\right)\left(5x^2-6\right)$
$5x^2-9x-2=0$
$64x^2-70x+25$
$\int\left(te^{-9t}\right)dt$
$\left(3x-y\right)\left(9x^2+y^2\right)\left(3x+y\right)$
$\int\sqrt{\frac{x}{4}}dx$
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