$a^2-11a+107$
$\int\left(\frac{in\:x}{x^3}\right)dx$
$b+b+bm$
$\lim_{x\to\infty}\frac{5x+9}{8x^2-3x+11}$
$sen\:\left(\:2x\:+\:20^{\circ}\right)\:-\:cos\:\left(\:y\:+\:10^{\circ}\right)\:=\:0$
$\int sen^{4\:}7\:\left(x\right)\:dx$
$q+10r-10r$
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