3x+x+x+81
5x-2y=-4
117591
625333
260287
933882
3523052
3874186
3118430
1867764
5
x
−
2
y
=
4
1866764
48887533555433356766+294338943599.7321
2 $\sqrt{\Box}$ 0.248=
20/ $x^{2}$ -6x-16 x $x^{2}$ -9x +8 /4
$$\prod_{a}^{b}{C}$$
evaluate 5cosec²45°-3sin²90°+5cos0°
$\i$
