$\int ( 2 x - 1 ) ( 7 x + 5 ) d x$
$3a-3=114$
$\int\left(\frac{x^7}{3+x^4}\right)dx$
$\left(4\cos x+5\right)\left(3\sin x-2x\right)$
$m^2\:-\:m^2\:-\:7m^2$
$2x^2-x+5$
$\left(3ax-4bx\right)^2$
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