$\frac{1}{2}\left(x^2+lnx-1\right)$
$\left(6c-11d\right)\left(2c-5d\right)$
$5\left(9+6\right)+3\left(10+2\right)$
$\frac{\left(v-w\right)^2-x}{v-w-\sqrt{x}}$
$cos^2=cos2$
$25x^2-\:4b^2$
$\lim_{x\to\frac{\pi}{4}}\left(sec^2u+csc^2u\right)$
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