$-45x+19y+31x-53y$
$a+24=7$
$x^2-6x-13$
$\int\frac{\left(x+1\right)}{\sqrt[3]{x^2+2x}}dx$
$\frac{dy}{dx}=\frac{x}{3y^2\left(1+x^2\right)}$
$\lim_{x\to\infty}\left(1+\frac{7}{x}\right)^{\frac{x}{11}}$
$\sin\left(b\:\right)\cos\left(b\right)=\tan\left(b\right)$
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