$sen\:a\:+3sen\:b\:-\:12sen\:a$
$\int\frac{1}{\left(x^2+2x+1\right)\left(x+3\right)}dx$
$-\left[5-7+3\left(+5-3\right)-4\right]$
$62+49-1$
$\frac{1}{1+\tan^2y}+\frac{1}{1+\cot^2y}=1$
$\left(10a-4b\right)^2$
$\left(17x^3+103x\right)$
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