$\sec^2x+\csc^2x-2$
$36c^2+84c+49$
$2x^2+9x-5$
$\left(6x^2-2y^4\right)^2$
$\frac{\tan\left(u\right)-\cot\left(u\right)}{\tan\left(u\right)+cot\left(u\right)}$
$\left(v-4\right)^4$
$3.6=1.2g$
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