$2b+2c$
$\int_1^{\infty}\left(\frac{\sqrt[2]{x+1}}{x^2}\right)dx$
$x^2-12xy+36y^2$
$2x^5-3x^3+5,\:x=2$
$\lim\:_{x\to\:\frac{\pi\:}{2}}\left(cos3x\cdot\:\:secx\right)$
$59^2-58^2$
$\frac{1}{\csc x}$
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