$\int\left(-\frac{14}{x+1}\right)dx$
$\frac{dx}{dt}=\frac{5x}{t}+t$
$\int\left(7x+5\right)\cos\left(7x+5\right)dx$
$-7+4+-1+-3-6$
$x^2+132x+132x-0$
$\tan\left(a\right)\sqrt{1-\sin^2\left(a\right)}=\sin\left(a\right)$
$\:\int\:\frac{4x+6}{x^3+x^2-2x}dx$
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