$\frac{sin\left(2t\right)}{sin\left(t\right)}$
$\left|-9\right|+10-4-8$
$25^2+40x+64$
$12x-13=-x^2$
$hk-hv$
$\log2\left(xe^x\right)$
$8x^2+2x+2$
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