$sec\left(x\right)=\frac{1}{\cos\left(x\right)}$
$8x^5-2x^4-19x^3-15x+6\:4x-3$
$4x^2\:+\:4k^3+\:5x^2\:-\:2k^3$
$\sqrt{5^2}a^4b^5$
$a^2+2a+7$
$-55a+112b;\:a=-35;\:b=-26$
$\int x\sqrt{5x^2+40x+75}dx$
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