$3x+5x-2x+2+4-1$
$-11f-3$
$9y^5\:9$
$\int\left(6-sin\frac{t}{2}\right)^2cos\frac{t}{2}dt$
$-45\left(+9-7-63\right)\cdot\left(+5-3-7\right)-8+3$
$55-x<25$
$\frac{1+sin\:t}{1\:-\:sin\:t}=\left(sec\:t+tan\:t\right)^2$
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