$\frac{1+\tan\left(x\right)^2}{1+\cot\left(x\right)^2}$
$348\cdot1.4-18\cdot1.4$
$3a+2+4a$
$\left(-3m\right)\left(5m^4-3m^4-3m^3+6m-3\right)$
$4x-7<21$
$25x^2+10x+2$
$\left(1+\frac{2i}{n}\right)^2$
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