$18y\:+\:8x\:-\:9y\:+10$
$\csc2v-\cot2v$
$8x^2-6x+9$
$2x^2-7x-9=0$
$\left(2x-1\right)\left(5x^3+4x+2\:\right)$
$z^5-243$
$\int\left(\frac{\sec\left(x\right)}{\tan^2\left(x\right)}\right)dx$
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