$\int\frac{\left(3x+5\right)}{\left(x^2+2x+2\right)}dx$
$\int e^x\left(xe^{-x}-e^{-x}\right)dx$
$8b-3t-5b+24t$
$\frac{\left(1\:-\:a\:-\:a^5\:-\:3a\:^2\right)}{\left(1\:+\:2a\:+\:a^2\right)}$
$3+-2\cdot5$
$x^{2\:}+6x=7$
$18x-11x-7x-20ab+11ab$
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