$\frac{cos\left(x\right)}{cos\left(x\right)+1}=\frac{1}{1+sec\left(x\right)}$
$\int\left(\frac{x\sqrt{x^2+1}}{2}\right)dx$
$\left(20+\frac{3}{5}xy^3\right)\left(20+\frac{3}{5}xy^3\right)$
$4\cdot\left(x+3\right)\ge-3\cdot\left(x-5\right)-1$
$.7\:+\:0.05$
$\left(a^{n+1}b-t^{n+2}\right)\left(a^{n+1}b+t^{n+2}\right)$
$7x<0$
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