$v+9=-48$
$89+k=-42$
$2\:x\:\left(-5\right)\:\:x\:\:3\:x\:\left(-4\right)$
$100:\left(-50\right).\left(-1\right)-\left(+20\right):\left(-10\right)+\left(-6+5\right):\left(-1\right)$
$\frac{t}{-5}+25=-15$
$-2\left(-4\right)^3+\left(-4\right)^2\left(3\right)^2-3\left(3\right)$
$\left(cosx-5\right)^2$
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