$2\cot\left(x\right)^2+5\cot\left(x\right)-3=0$
$p^2=49$
$\left(sen\left(t\right)+t\right)\left(sen\left(t\right)\right)$
$\left(25\cdot2\right)-\left(\frac{12}{3}\right)$
$2x^2+40x+150$
$\int3z^2dz$
$8-i-18i$
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