$36n^2-25$
$\lim_{x\to\infty}\left(\frac{15x^2}{e^{4x}}\right)$
$\sin^21.01+\cos^21.01$
$20 x ^ { 2 } - 8 x$
$4^2+4fg+g^2$
$6x^3-5xy^2+3x^3-5x^3+2xy^2+3xy^2+2x^3$
$\lim_{x\to0}\frac{y}{y^4}$
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