$\lim_{x\to0}\left(\frac{1-cos\left(x\right)}{\sin\left(2x\right)}\right)$
$\left(7x^2+5x-8\right)x\left(x^2+3x+5\right)$
$9x^3-24x^2$
$\int\left(tanx^5\cdot secx^2\right)dx$
$86\cdot7$
$-15-\left(-11\right)$
$y-12=75$
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