$m^2-6mn+9n^2$
$5\int_0^2\left(12-x^2\right)\left(x^2-2x\right)dx$
$\int x^3\left(x-5\right)dx$
$x^2-6x-10$
$20b^2+5b$
$tan^2x\cdot\left(1-sen^2x\right)=s$
$\lim_{x\to0}\left(\frac{7^x-2^x}{8x}\right)$
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