$-12=4\left(f-6\right)$
$-3+9-12-9-12-19$
$5u.\left(4-11u\right)$
$4y\:+3\left(y-2\right)<\:7y$
$8x^2+8y^2=4$
$290\cdot16\cdot350$
$3\frac{1}{\cos\left(x\right)}-\frac{1}{\cos^2\left(x\right)}=2$
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