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void MainWindow::justDoIt(){
ui->textEdit->clear();
bool b[16];
for (int i = 0; i < 16; ++i) {
b[i] = false;
}
ui->textEdit->append("$$ \n \\begin{cases}");
QString a;
a += (ui->lineEdit->text().toDouble() == 0 ? "": (b[0] = true, ui->lineEdit->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_1" :ui->lineEdit->text().remove("+") + "x_1"));
a += (ui->lineEdit_2->text().toDouble() == 0 ? "" : (b[1] = true,ui->lineEdit_2->text().toDouble() < 0 || (!b[0])? "":"+") +(ui->lineEdit_2->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_2" : ui->lineEdit_2->text().remove("+")+"x_2"));
a += (ui->lineEdit_3->text().toDouble() == 0 ? "" : (b[2] = true,ui->lineEdit_3->text().toDouble() < 0 || (!b[0] && !b[1]) ? "":"+") +(ui->lineEdit_3->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_3" :ui->lineEdit_3->text().remove("+")+"x_3"));
a += (ui->lineEdit_4->text().toDouble() == 0 ? "" : (b[3] = true,ui->lineEdit_4->text().toDouble() < 0 || (!b[0] && !b[1] && !b[2])? "":"+") +(ui->lineEdit_4->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_4" :ui->lineEdit_4->text().remove("+")+"x_4"));
if(b[0] || b[1] || b[2] || b[3]){
a += "=";
a += ui->lineEdit_5->text();
a += "\\\\\n";
}
/*еще такой же код*/
a += (ui->lineEdit_24->text().toDouble() == 0 ? "" : (b[12] = true,ui->lineEdit_24->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_1" :ui->lineEdit_24->text()+"x_1"));
a += (ui->lineEdit_21->text().toDouble() == 0 ? "" : (b[13] = true,ui->lineEdit_21->text().toDouble() < 0 || (!b[13])? "":"+") +(ui->lineEdit_21->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_2" :ui->lineEdit_21->text().remove("+")+"x_2"));
a += (ui->lineEdit_23->text().toDouble() == 0 ? "" : (b[14] = true,ui->lineEdit_23->text().toDouble() < 0 || (!b[13]&&!b[14])? "":"+") +(ui->lineEdit_23->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_3" :ui->lineEdit_23->text().remove("+")+"x_3"));
a += (ui->lineEdit_22->text().toDouble() == 0 ? "" : (b[15] = true,ui->lineEdit_22->text().toDouble() < 0 || (!b[13]&&!b[14]&&!b[15])? "":"+") +(ui->lineEdit_22->text().toDouble() == 1 && ui->checkBox->isChecked() ? "x_4" :ui->lineEdit_22->text().remove("+")+"x_4"));
if(b[12] || b[13] || b[14] || b[15]){
a += "=";
a += ui->lineEdit_25->text();
}
ui->textEdit->append(a);
ui->textEdit->append("\\end{cases} \n$$");
}
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