$\int\left(4cos\left(7x\right)\right)dx$
$\int\left(3x^2+2x\right)\ln\left(x+1\right)dx$
$\lim_{x\to0}\left(\frac{1-\cos\left(\sqrt{x}\right)}{x}\right)$
$12^5y^2+9x^4y+6x^3y^2$
$\left(4x^2y^2\right)\left(-3x^3y^2\right)$
$11b+9b$
$( 4 a + 5 ) \cdot ( 4 a - 5 )$
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