$2sin\:\frac{1}{8}x-1=0$
$6x^2+7+12$
$-169-105$
$k^3=216$
$\int_{-\pi}^0\sin\left(10x\right)\cos\left(7x\right)dx$
$x=5^y$
$1+cos\left(-x\right)$
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