$\left(3a^2-2b^2\right)^2$
$\lim_{x\to0}\left(5cos\left(7x\right)sec\left(-9x\right)\right)$
$\int\frac{2cosx}{2cosx}dx$
$\int\left(\frac{140}{t^3+3t^2-10t}\right)dt$
$\int_0^{\infty}\left(\frac{x}{2+x^2}\right)dx$
$4x^2-16x+0$
$3x^3+9x^2+12x-6x^4$
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