$\int_{-1}^2\left(3x^2+2x+3\right)dx$
$5\cdot\:3^3$
$sin^4x=cos^4$
$a=21\:,\:b=18$
$\frac{\cos\left(x\right)}{\sin\left(x\right)}-\frac{\sin\left(x\right)}{\cos\left(x\right)}=2\cot\left(2x\right)$
$\left(3a+5y\right)^2$
$\left(\log_a\left(\frac{1}{x}\right)\right)^3$
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